Mendel’s Laws ofHeredityWhy we look the waywe look...
What is heredity?The passing on ofcharacteristics (traits)from parents to offspringGenetics is the study ofheredity
Mendel used peas...They reproduce sexuallyThey have two distinct,male and female, sex cellscalled gametesTheir traits are ...
Mendel crossed themFertilization - the unitingof male and femalegametesCross - combining gametesfrom parents withdifferent...
QuestionsWhat did Mendel cross?What are traits?What are gametes?What is fertilization?What is heredity?What is genetics?
What Did Mendel Find?He discovered differentlaws and rules that explainfactors affecting heredity.
Rule of Unit FactorsEach organism has twoalleles for each trait  – Alleles - different forms of    the same gene  – Genes ...
Rule of DominanceThe trait that is observedin the offspring is thedominant trait (uppercase)The trait that disappearsin th...
Law of SegregationThe two alleles for a traitmust separate whengametes are formedA parent randomly passesonly one allele f...
Law of IndependentAssortment The genes for different traits are inherited independently of each other.
Questions...How many alleles are therefor each trait?What is an allele?How many alleles does aparent pass on to eachoffspr...
Questions...What do we call the traitthat is observed?What case (upper or lower)is it written in?What about the one thatdi...
Phenotype & GenotypePhenotype - the way anorganism looks  – red hair or brown hairgenotype - the genecombination of an org...
Heterozygous & Homozygous   Heterozygous - if the two   alleles for a trait are   different (Aa)   Homozygous - if the two...
Dihybrid vs Monohybrid Dihybrid Cross - crossing parents who differ in two traits (AAEE with aaee) Monohybrid Cross - cros...
Questions...What is the phenotype?What is the genotype?What is homozygous?What is heterozygous?What is monohybridcrossing?
Upcoming SlideShare
Loading in...5
×

Mende

620

Published on

2nd year

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
620
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
15
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Mende

  1. 1. Mendel’s Laws ofHeredityWhy we look the waywe look...
  2. 2. What is heredity?The passing on ofcharacteristics (traits)from parents to offspringGenetics is the study ofheredity
  3. 3. Mendel used peas...They reproduce sexuallyThey have two distinct,male and female, sex cellscalled gametesTheir traits are easy toisolate
  4. 4. Mendel crossed themFertilization - the unitingof male and femalegametesCross - combining gametesfrom parents withdifferent traits
  5. 5. QuestionsWhat did Mendel cross?What are traits?What are gametes?What is fertilization?What is heredity?What is genetics?
  6. 6. What Did Mendel Find?He discovered differentlaws and rules that explainfactors affecting heredity.
  7. 7. Rule of Unit FactorsEach organism has twoalleles for each trait – Alleles - different forms of the same gene – Genes - located on chromosomes, they control how an organism develops
  8. 8. Rule of DominanceThe trait that is observedin the offspring is thedominant trait (uppercase)The trait that disappearsin the offspring is therecessive trait (lowercase)
  9. 9. Law of SegregationThe two alleles for a traitmust separate whengametes are formedA parent randomly passesonly one allele for eachtrait to each offspring
  10. 10. Law of IndependentAssortment The genes for different traits are inherited independently of each other.
  11. 11. Questions...How many alleles are therefor each trait?What is an allele?How many alleles does aparent pass on to eachoffspring for each trait
  12. 12. Questions...What do we call the traitthat is observed?What case (upper or lower)is it written in?What about the one thatdisappears?What case is it written in?
  13. 13. Phenotype & GenotypePhenotype - the way anorganism looks – red hair or brown hairgenotype - the genecombination of an organism – AA or Aa or aa
  14. 14. Heterozygous & Homozygous Heterozygous - if the two alleles for a trait are different (Aa) Homozygous - if the two alleles for a trait are the same (AA or aa)
  15. 15. Dihybrid vs Monohybrid Dihybrid Cross - crossing parents who differ in two traits (AAEE with aaee) Monohybrid Cross - crossing parents who differ in only one trait (AA with aa)
  16. 16. Questions...What is the phenotype?What is the genotype?What is homozygous?What is heterozygous?What is monohybridcrossing?
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×