Gregor Mendel conducted experiments with pea plants between 1856-1863. He studied seven traits in pea plants, including seed shape, seed color, pod shape, etc. Through his experiments involving thousands of pea plants, he developed the laws of inheritance. His work showed that traits are passed from parents to offspring through discrete factors, now known as genes. Mendel's work established the foundations of classical genetics though it was not widely recognized until the early 20th century.
Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity in organisms. Though heredity had been observed for millennia, Gregor Mendel, Moravian scientist and Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Mendel studied "trait inheritance", patterns in the way traits are handed down from parents to offspring over time. He observed that organisms (pea plants) inherit traits by way of discrete "units of inheritance". This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene.
Trait inheritance and molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century, but modern genetics has expanded beyond inheritance to studying the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the cell, the organism (e.g. dominance), and within the context of a population. In science and especially in mathematical studies, a variational principle is one that enables a problem to be solved using calculus of variations, which concerns finding functions that optimize the values of quantities that depend on those functions.
Law of Dominance - Recessive alleles will always be masked by dominant alleles .
Law of Segregation - At the time of gametes formation the two copies of each hereditary factor segregates so that offspring get one factor from each parent .
Law of Independent Assortment - Genes for one trait are not inherited together with another trait .
Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity in organisms. Though heredity had been observed for millennia, Gregor Mendel, Moravian scientist and Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Mendel studied "trait inheritance", patterns in the way traits are handed down from parents to offspring over time. He observed that organisms (pea plants) inherit traits by way of discrete "units of inheritance". This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene.
Trait inheritance and molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century, but modern genetics has expanded beyond inheritance to studying the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the cell, the organism (e.g. dominance), and within the context of a population. In science and especially in mathematical studies, a variational principle is one that enables a problem to be solved using calculus of variations, which concerns finding functions that optimize the values of quantities that depend on those functions.
Law of Dominance - Recessive alleles will always be masked by dominant alleles .
Law of Segregation - At the time of gametes formation the two copies of each hereditary factor segregates so that offspring get one factor from each parent .
Law of Independent Assortment - Genes for one trait are not inherited together with another trait .
IF YOU ARE GOING TO DOWNLOAD THIS FILE, PLEASE NOTIFY me by sending a message via Facebook.
It's a pleasure to help you through my presentation. Thank you so much!
Dear students, in this ppt you will able to understand about the Incomplete dominance. Incomplete dominance is an allelic interaction. In incomplete dominance, both alleles of a character express their character in the F1 generation.
We could define Mendel´s laws as the basic laws that talks about the inheritance of biological features that every human being has. They were created by Gregor Johann Mendel in 1865. Mendel created three laws: The law of Segregation, the law of Independent Assortment and the law of Dominance.
The rules of Mendel's inheritance: In a cross between pure contrasting traits, the dominant trait will be observed in the phenotype of the organism whilst the recessive trait will be concealed. Only a single gene copy is allocated in a gamete cell and this is carried out in a random manner.
Mendel’s Procedure: (i) Mendel observed one trait at a time. For example, he crossed tall and dwarf pea plants to study the inheritance of one gene. (ii) He hybridised plants with alternate forms of a single trait (monohybrid cross). The seeds produced by this cross were grown to develop into plants of Fillial 1 progeny or F 1 -generation
MENDELE'S EXPERIMNENT AND TERMINOLOGY, BY MR. DINABANDHU BARAD, MSC TUTOR, DEPARTMENT OF PEDIATRIC, SUM NURSING COLLEGE, SIKSHA 'O' ANUSANDHAN DEEMED TO BE UNIVERSITY
GENETICS - Dr. P. Saranraj, Assistant Professor, Department of Microbiology, Sacred Heart College (Autonomous), Tirupattur, Vellore District, Tamil Nadu, India
IF YOU ARE GOING TO DOWNLOAD THIS FILE, PLEASE NOTIFY me by sending a message via Facebook.
It's a pleasure to help you through my presentation. Thank you so much!
Dear students, in this ppt you will able to understand about the Incomplete dominance. Incomplete dominance is an allelic interaction. In incomplete dominance, both alleles of a character express their character in the F1 generation.
We could define Mendel´s laws as the basic laws that talks about the inheritance of biological features that every human being has. They were created by Gregor Johann Mendel in 1865. Mendel created three laws: The law of Segregation, the law of Independent Assortment and the law of Dominance.
The rules of Mendel's inheritance: In a cross between pure contrasting traits, the dominant trait will be observed in the phenotype of the organism whilst the recessive trait will be concealed. Only a single gene copy is allocated in a gamete cell and this is carried out in a random manner.
Mendel’s Procedure: (i) Mendel observed one trait at a time. For example, he crossed tall and dwarf pea plants to study the inheritance of one gene. (ii) He hybridised plants with alternate forms of a single trait (monohybrid cross). The seeds produced by this cross were grown to develop into plants of Fillial 1 progeny or F 1 -generation
MENDELE'S EXPERIMNENT AND TERMINOLOGY, BY MR. DINABANDHU BARAD, MSC TUTOR, DEPARTMENT OF PEDIATRIC, SUM NURSING COLLEGE, SIKSHA 'O' ANUSANDHAN DEEMED TO BE UNIVERSITY
GENETICS - Dr. P. Saranraj, Assistant Professor, Department of Microbiology, Sacred Heart College (Autonomous), Tirupattur, Vellore District, Tamil Nadu, India
A perfect PPT made in microsoft office 2013 which has already a 1st prize in district's PPT competition.
This PPT contains eye catching contrast of different colours and contains very attractive transitions .
Also it contains videos to make the PPT more presentable.
Each slide is made understandable with diagramitacaly images.
Hope it will help you....................
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
2. January 15, 2015R. M. Mahindrakar
2
Gregor Mendel
(1822-1884)
Responsible
for the Laws
governing
Inheritance of
Traits
3. GREGOR JOHANN MENDEL
Austrian monk
Studied the
inheritance of traits
in pea plants
Developed the laws
of inheritance
Mendel's work was
not recognized until
the turn of the 20th
century
January 15, 2015
3
4. GREGOR JOHANN MENDEL
Between 1856 and
1863, Mendel
cultivated and tested
some 28,000 pea
plants
He found that the
plants' offspring
retained traits of the
parents
Called the “Father
of Genetics"
January 15, 2015
4
6. January 15, 2015R. M. Mahindrakar
6
Mendel stated that
physical traits are
inherited as “particles”
Mendel did not know
that the “particles”
were actually
Chromosomes & DNA
PARTICULATE INHERITANCE
7. GENETIC TERMINOLOGY
Trait - any characteristic that
can be passed from parent to
offspring
Heredity - passing of traits from
parent to offspring
Genetics - study of heredity
January 15, 2015R. M. Mahindrakar
7
8. TYPES OF GENETIC CROSSES
Monohybrid cross - cross
involving a single trait
e.g. flower color
Dihybrid cross - cross involving
two traits
e.g. flower color & plant height
January 15, 2015R. M. Mahindrakar
8
11. DESIGNER “GENES”
Alleles - two forms of a gene
(dominant & recessive)
Dominant - stronger of two genes
expressed in the hybrid; represented
by a capital letter (R)
Recessive - gene that shows up less
often in a cross; represented by a
lowercase letter (r)
January 15, 2015R. M. Mahindrakar
11
12. MORE TERMINOLOGY
Genotype - gene combination
for a trait (e.g. RR, Rr, rr)
Phenotype - the physical
feature resulting from a
genotype (e.g. Pink, white)
January 15, 2015R. M. Mahindrakar
12
13. GENOTYPE & PHENOTYPE IN FLOWERS
January 15, 2015R. M. Mahindrakar
13
Genotype of alleles:
R = red flower
r = yellow flower
All genes occur in pairs, so 2
alleles affect a characteristic
Possible combinations are:
Genotypes RR Rr rr
Phenotypes RED RED YELLOW
14. GENOTYPES
Homozygous genotype - gene
combination involving 2 dominant
or 2 recessive genes (e.g. RR or
rr); also called pure
Heterozygous genotype - gene
combination of one dominant &
one recessive allele (e.g. Rr);
also called hybrid
January 15, 2015R. M. Mahindrakar
14
15. January 15, 2015R. M. Mahindrakar
15
GENES AND ENVIRONMENT
DETERMINE CHARACTERISTICS
17. WHY PEAS, PISUM SATIVUM?
Can be grown in a small area
Produce lots of offspring
Produce pure plants when
allowed to self-pollinate
several generations
Can be artificially cross-
pollinated
January 15, 2015
R. M. Mahindrakar
17
18. REPRODUCTION IN FLOWERING PLANTS
Pollen Produced by
the stamen contains
male gamete
Ovary contains eggs
January 15, 2015
18
Pollen carries male gamete
to the eggs for fertilization
Self-fertilization can
occur in the same flower
Cross-fertilization can
occur between flowers
19.
20. January 15, 2015R. M. Mahindrakar
20
How Mendel Began
Mendel
produced
pure
strains by
allowing the
plants to
self-
pollinate
for several
generations
21. EIGHT PEA PLANT TRAITS
Seed shape --- Round (R) or Wrinkled (r)
Seed Color ---- Yellow (Y) or Green (y)
Pod Shape --- Smooth (S) or constricted
(s)
Pod Color --- Green (G) or Yellow (g)
Seed Coat Color ---Gray (G) or White (g)
Flower position---Axial (A) or Terminal (a)
Plant Height --- Tall (T) or Short (t)
Flower color --- Purple (P) or white (p)
January 15, 2015R. M. Mahindrakar
21
25. Did the observed ratio match the theoretical ratio?
January 15, 2015R. M. Mahindrakar
25
The theoretical or expected ratio of
plants producing round or wrinkled seeds
is 3 round :1 wrinkled
Mendel’s observed ratio was 2.96:1
The discrepancy is due to statistical
error
The larger the sample the more nearly
the results approximate to the
theoretical ratio
26. GENERATION “GAP”
Parental P1 Generation = the parental
generation in a breeding experiment.
F1 generation = the first-generation
offspring in a breeding experiment. (1st
filial generation)
From breeding individuals from the P1
generation
F2 generation = the second-generation
offspring in a breeding experiment.
(2nd filial generation)
From breeding individuals from the F1
generation
January 15, 2015R. M. Mahindrakar
26
27. FOLLOWING THE GENERATIONS
January 15, 2015R. M. Mahindrakar
27
Cross 2
Pure
Plants
TT x tt
Results
in all
Hybrids
Tt
Cross 2 Hybrids
get
3 Tall & 1 Short
TT, Tt, tt
29. P1 MONOHYBRID CROSS
Trait: Seed Shape
Alleles: R – Round r – Wrinkled
Cross: Round seeds x Wrinkled seeds
RR x rr
January 15, 2015R. M. Mahindrakar
29
R
R
rr
Rr
RrRr
Rr
Genotype: Rr
Phenotype: Round
Genotypic
Ratio: All alike
Phenotypic
Ratio: All alike
30. P1 MONOHYBRID CROSS REVIEW
Homozygous dominant x
Homozygous recessive
Offspring all Heterozygous (hybrids)
Offspring called F1 generation
Genotypic & Phenotypic ratio is ALL
ALIKE
January 15, 2015R. M. Mahindrakar
30
31. F1 MONOHYBRID CROSS
Trait: Seed Shape
Alleles: R – Round r – Wrinkled
Cross: Round seeds x Round seeds
Rr x Rr
January 15, 2015R. M. Mahindrakar
31
R
r
rR
RR
rrRr
Rr
Genotype: RR, Rr, rr
Phenotype: Round &
wrinkled
G.Ratio: 1:2:1
P.Ratio: 3:1
32. F1 MONOHYBRID CROSS REVIEW
Heterozygous x heterozygous
Offspring:
25% Homozygous dominant RR
50% Heterozygous Rr
25% Homozygous Recessive rr
Offspring called F2 generation
Genotypic ratio is 1:2:1
Phenotypic Ratio is 3:1
January 15, 2015R. M. Mahindrakar
32
34. …AND NOW THE TEST CROSS
Mendel then crossed a pure & a
hybrid from his F2 generation
This is known as an F2 or test
cross
There are two possible
testcrosses:
Homozygous dominant x Hybrid
Homozygous recessive x Hybrid
January 15, 2015R. M. Mahindrakar
34
35. F2 MONOHYBRID CROSS (1ST)
Trait: Seed Shape
Alleles: R – Round r – Wrinkled
Cross: Round seeds x Round seeds
RR x Rr
January 15, 2015R. M. Mahindrakar
35
R
R
rR
RR
RrRR
Rr
Genotype: RR, Rr
Phenotype: Round
Genotypic
Ratio: 1:1
Phenotypic
Ratio: All alike
36. F2 MONOHYBRID CROSS (2ND)
Trait: Seed Shape
Alleles: R – Round r – Wrinkled
Cross: Wrinkled seeds x Round seeds
rr x Rr
January 15, 2015R. M. Mahindrakar
36
r
r
rR
Rr
rrRr
rr
Genotype: Rr, rr
Phenotype: Round &
Wrinkled
G. Ratio: 1:1
P.Ratio: 1:1
37. F2 MONOHYBRID CROSS REVIEW
Homozygous x heterozygous(hybrid)
Offspring:
50% Homozygous RR or rr
50% Heterozygous Rr
Phenotypic Ratio is 1:1
Called Test Cross because the
offspring have SAME genotype as
parents
January 15, 2015R. M. Mahindrakar
37
38. PRACTICE YOUR CROSSES
Work the P1, F1, and both F2
Crosses for each of the
other Seven Pea Plant
Traits
January 15, 2015R. M. Mahindrakar
38
40. RESULTS OF MONOHYBRID CROSSES
Inheritable factors or genes are
responsible for all heritable
characteristics
Phenotype is based on Genotype
Each trait is based on two genes,
one from the mother and the other
from the father
True-breeding individuals are
homozygous ( both alleles) are the
same
January 15, 2015R. M. Mahindrakar
40
41. LAW OF DOMINANCE
January 15, 2015
41
In a cross of parents that are
pure for contrasting traits, only
one form of the trait will appear in
the next generation.
All the offspring will be
heterozygous and express only the
dominant trait.
RR x rr yields all Rr (round seeds)
43. LAW OF SEGREGATION
During the formation of gametes
(eggs or sperm), the two alleles
responsible for a trait separate from
each other.
Alleles for a trait are then
"recombined" at fertilization,
producing the genotype for the traits
of the offspring.
January 15, 2015R. M. Mahindrakar
43
45. LAW OF INDEPENDENT ASSORTMENT
Alleles for different traits are
distributed to sex cells (&
offspring) independently of one
another.
This law can be illustrated using
dihybrid crosses.
January 15, 2015R. M. Mahindrakar
45
46. DIHYBRID CROSS
A breeding experiment that tracks the
inheritance of two traits.
Mendel’s “Law of Independent
Assortment”
a. Each pair of alleles segregates
independently during gamete formation
b. Formula: 2n (n = # of heterozygotes)
January 15, 2015R. M. Mahindrakar
46
47. QUESTION:
HOW MANY GAMETES WILL BE PRODUCED FOR
THE FOLLOWING ALLELE ARRANGEMENTS?
Remember: 2n (n = # of heterozygotes)
1. RrYy
2. AaBbCCDd
3. MmNnOoPPQQRrssTtQq
January 15, 2015R. M. Mahindrakar
47
48. ANSWER:
January 15, 2015R. M. Mahindrakar
48
1. RrYy: 2n = 22 = 4 gametes
RY Ry rY ry
2. AaBbCCDd: 2n = 23 = 8 gametes
ABCD ABCd AbCD AbCd
aBCD aBCd abCD abCD
3. MmNnOoPPQQRrssTtQq: 2n = 26 = 64
gametes
49. DIHYBRID CROSS
Traits: Seed shape & Seed color
Alleles: R round
r wrinkled
Y yellow
y green
January 15, 2015R. M. Mahindrakar
49
RrYy x RrYy
RY Ry rY ry RY Ry rY ry
All possible gamete combinations
50. DIHYBRID CROSS
January 15, 2015R. M. Mahindrakar
50
RY Ry rY ry
RY
Ry
rY
ry
RRYY RRYy RrYY RrYy
RRyY RRyy RrYy Rryy
rrYyrrYYRrYyRrYY
RrYy Rryy rrYy rryy
Round/Yellow : 9
Round/green : 3
wrinkled/Yellow: 3
wrinkled/green: 1
9:3:3:1 Phenotypic
ratio
51. TEST CROSS
A mating between an individual of unknown
genotype and a homozygous recessive
individual.
Example: T __ x tt
TT ---- Tall
Tt ----- Tall
tt ----- Dwarf
January 15, 2015R. M. Mahindrakar
51
T ___
t
52. TEST CROSS
Possible results:
January 15, 2015R. M. Mahindrakar
52
T T
t
T t
tTt Tt Tt tt
All tall
variety
Tall & Dwarf in
1 : 1 ratio
53. SUMMARY OF MENDEL’S LAWS
January 15, 2015R. M. Mahindrakar
53
LAW
PARENT
CROSS
OFFSPRING
DOMINANCE TT x tt
tall x short
100% Tt
tall
SEGREGATION
Tt x Tt
tall x tall
75% tall
25% short
INDEPENDENT
ASSORTMENT
RrGg x RrGg
round & green
x
round & green
9/16 round seeds & green
pods
3/16 round seeds & yellow
pods
3/16 wrinkled seeds & green
pods
1/16 wrinkled seeds & yellow
pods
54. INCOMPLETE DOMINANCE
F1 hybrids have an appearance somewhat
in between the phenotypes of the two
parental varieties.
Example: snapdragons (flower)
red (RR) x white (rr)
RR = red flower
rr = white flower
January 15, 2015R. M. Mahindrakar
54
R
R
r r
55. INCOMPLETE DOMINANCE
January 15, 2015R. M. Mahindrakar
55
Rr
Rr
Rr
Rr
R
R
r
All Rr = pink
(heterozygous pink)
produces the
F1 generation
r
57. CODOMINANCE
Two alleles are expressed (multiple
alleles) in heterozygous individuals.
Example: blood type
1. type A = IAIA or IAi
2. type B = IBIB or IBi
3. type AB = IAIB
4. type O = ii
January 15, 2015R. M. Mahindrakar
57
58. CODOMINANCE PROBLEM
Example: homozygous male Type B
(IBIB)
x
heterozygous female Type A
(IAi)
January 15, 2015R. M. Mahindrakar
58
IAIB IBi
IAIB IBi
1/2 = IAIB
1/2 = IBi
IB
IA i
IB
59. ANOTHER CODOMINANCE PROBLEM
January 15, 2015R. M. Mahindrakar
59
• Example: male Type O (ii)
x
female type AB (IAIB)
IAi IBi
IAi IBi
1/2 = IAi
1/2 = IBi
i
IA IB
i
60. CODOMINANCE
Question:
If a boy has a blood type O and
his sister has blood type AB,
what are the genotypes and
phenotypes of their parents?
boy - type O (ii) X girl - type AB
(IAIB)
January 15, 2015R. M. Mahindrakar
60
62. SEX-LINKED TRAITS
Traits (genes) located on the sex
chromosomes
Sex chromosomes are X and Y
XX genotype for females
XY genotype for males
Many sex-linked traits carried on
X chromosome
January 15, 2015R. M. Mahindrakar
62
63. SEX-LINKED TRAITS
January 15, 2015R. M. Mahindrakar
63
Sex Chromosomes
XX chromosome - female Xy chromosome - male
fruit fly
eye color
Example: Eye color in fruit flies
64. SEX-LINKED TRAIT PROBLEM
Example: Eye color in fruit flies
(red-eyed male) x (white-eyed female)
XRY x XrXr
Remember: the Y chromosome in males does
not carry traits.
RR = red eyed
Rr = red eyed
rr = white eyed
XY = male
XX = female
January 15, 2015R. M. Mahindrakar
64
XR
Xr Xr
Y
65. SEX-LINKED TRAIT SOLUTION:
January 15, 2015R. M. Mahindrakar
65
XR Xr
Xr Y
XR Xr
Xr Y
50% red eyed
female
50% white eyed
male
XR
Xr Xr
Y
68. BREED THE P1 GENERATION
tall (TT) x dwarf (tt) pea plants
January 15, 2015R. M. Mahindrakar
68
T
T
t t
69. SOLUTION:
January 15, 2015R. M. Mahindrakar
69
T
T
t t
Tt
Tt
Tt
Tt All Tt = tall
(heterozygous tall)
produces the
F1 generation
tall (TT) vs. dwarf (tt) pea plants
70. BREED THE F1 GENERATION
tall (Tt) vs. tall (Tt) pea plants
January 15, 2015R. M. Mahindrakar
70
T
t
T t
71. SOLUTION:
January 15, 2015R. M. Mahindrakar
71
TT
Tt
Tt
tt
T
t
T t
produces the
F2 generation
1/4 (25%) = TT
1/2 (50%) = Tt
1/4 (25%) = tt
1:2:1 genotype
3:1 phenotype
tall (Tt) x tall (Tt) pea plants