Incomplete and codominance
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This document discusses incomplete dominance and codominance. Codominance occurs when two alleles are both expressed together, such as blood type AB having both A and B proteins. Incomplete dominance results in a blended phenotype from two alleles, like a pink flower from a cross of red and white alleles. Examples are provided of codominance in blood types and incomplete dominance in flower color. Sample questions assess understanding and ask to identify examples and predict offspring phenotypes and percentages through Punnett squares.
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This presentation is an introduction to the various types of non-Mendelian inheritance (genetic inheritance that does not follow Mendel's laws)
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- Gregor Mendel conducted experiments with pea plants between 1856-1863 and discovered the laws of inheritance by breeding and tracking different traits over multiple generations.
- He found that traits are passed from parents to offspring through "particles" that we now know to be genes and alleles. His work established the fundamentals of genetics including dominance, segregation and independent assortment.
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Incomplete and co dominance ppt
The document discusses two genetic concepts: incomplete dominance and codominance. In incomplete dominance, the heterozygous genotype produces an intermediate phenotype between the two homozygous genotypes. For example, in flowers red and white petal color show incomplete dominance, where heterozygotes are pink. Codominance occurs when both alleles are fully expressed in the heterozygote. For example, in cattle black and white coat colors are codominant, where heterozygotes are spotted. The document provides examples calculating genotypic and phenotypic ratios for offspring from crosses involving these inheritance patterns.
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Non-Mendelian_Genetics.pptx
1. The document discusses several concepts in genetics including incomplete dominance, codominance, multiple alleles, and sex-linked traits. It provides examples of each concept using organisms like flowers, cows, and humans.
2. Non-Mendelian inheritance patterns like incomplete dominance and codominance are explained. In incomplete dominance, the heterozygous phenotype is a blending of the two homozygous phenotypes. In codominance, both alleles are expressed equally in the heterozygote.
3. Human blood types are provided as an example of codominance and multiple alleles. The different blood type alleles and their interactions are summarized.
incompleteandcodominance.ppt
1. Incomplete dominance occurs when neither allele of a gene is fully dominant over the other. The heterozygous phenotype is a blending of the two homozygous phenotypes. For example, a cross between red and white flowers produces pink flowers.
2. Codominance occurs when both alleles of a gene are fully expressed in the heterozygote. The phenotype shows a combination of both traits. For example, in humans, a person with one allele for A blood and one for B blood has type AB blood and their red blood cells have both A and B antigens.
3. Human blood types (A, B, AB, O) demonstrate both codominance and multiple alleles at a single gene locus.
Genetics Part 2
This document provides an overview of several genetics concepts including:
1) Mendelian genetics concepts like monohybrid and dihybrid crosses as well as test crosses.
2) The concepts of incomplete dominance and codominance where neither or both alleles are expressed in heterozygotes.
3) ABO blood types as an example of codominance with multiple alleles.
4) Sex determination and sex-linked traits related to the X and Y chromosomes.
5) How pedigrees are used to track the inheritance of traits through families.
Advanced Genetics
This document provides an overview of several genetics concepts including:
1) Mendelian genetics concepts like monohybrid and dihybrid crosses as well as test crosses.
2) Incomplete dominance where neither allele is fully dominant and heterozygotes exhibit a blended phenotype.
3) Codominance where both alleles are expressed in heterozygotes, as seen in ABO blood types which have multiple alleles.
4) Autosomal and sex chromosomes with the determination of gender based on X and Y chromosomes.
5) Sex-linked traits which are inherited through sex chromosomes like color blindness.
6) Pedigrees which diagram family history to determine patterns of inheritance and trait linkage.
Genetics and heredity
This document discusses several key genetics and heredity concepts including:
1. Probability and how it relates to inheritance through examples like coin flips and offspring traits.
2. Gregor Mendel's pioneering work in genetics including his studies of dominant and recessive traits using pea plants.
3. Punnett squares and how they can be used to predict the probability of different genotypes and phenotypes resulting from genetic crosses.
4. More complex inheritance patterns like codominance, multiple alleles, sex-linked traits, and analyzing pedigrees.
Biology Form 5 Chapter 5 : 5.1 Inheritance
- Gregor Mendel conducted experiments with pea plants in the 1860s and is considered the founder of genetics. Through his experiments, he discovered the fundamental laws of inheritance.
- Mendel determined that traits are passed from parents to offspring through "factors" that we now know as genes. His laws of inheritance include dominance, segregation, and independent assortment.
- Mendel's work formed the basis for understanding how traits are inherited and laid the foundation for modern genetics.
Genetics 2
The document discusses heredity and genetics, including Gregor Mendel's experiments with pea plants that laid the foundations for modern genetics. It explains basic genetics concepts such as alleles, genotypes, phenotypes, monohybrid and dihybrid crosses. The document also covers inheritance patterns such as incomplete dominance, codominance, and sex-linked traits.
Basics of Genetics presented by waseem javid
This document provides an overview of genetics concepts including:
- Gregor Mendel is considered the "Father of Genetics" and discovered the principles of inheritance including independent assortment.
- Traits are determined by genes located on chromosomes, which are received in homologous pairs from each parent. Genes can be dominant, recessive, or codominant.
- A Punnett square can be used to predict the possible genotypes and phenotypes of offspring from a genetic cross based on the parents' genotypes.
- Sex is determined by sex chromosomes, with females typically having XX and males having XY. Sex-linked traits are located on the X chromosome.
- Pedigrees can represent the inheritance of traits through generations
Chapter 5 section 2 notes
This document covers several genetics concepts including incomplete dominance, multiple alleles, polygenic inheritance, mutations, recessive disorders, sex determination, sex-linked disorders, and how to read a pedigree. It provides examples for each concept such as pink flowers to demonstrate incomplete dominance, blood types for multiple alleles, and color blindness as a sex-linked disorder. Pedigrees are used to track traits through generations of a family.
Ch14 notes website
This document summarizes different patterns of human inheritance including:
- Autosomal dominant traits where a single abnormal gene causes the trait. Examples given are Huntington's disease.
- Autosomal recessive traits which require two abnormal genes to show. Carriers have one abnormal gene. Examples given are Tay-Sachs disease and cystic fibrosis.
- Sex-linked traits located on the sex chromosomes. Examples given are colorblindness and hemophilia which are recessive and X-linked.
non-medelian inheritance according to mendal.pdf
Non-Mendelian genetics describes inheritance patterns that differ from simple Mendelian dominant and recessive traits. These include incomplete dominance where the heterozygote expresses a blend of both homozygotes, codominance where both alleles are fully expressed in the heterozygote, multiple alleles where there are more than two allele options, polygenic traits which are influenced by multiple genes, and sex-linked traits which are carried on the X chromosome. Examples are given for each type of non-Mendelian inheritance.
06_Notes_Non-Mendelian_Genetics_Student.ppt
This document discusses several types of non-Mendelian inheritance patterns:
1. Incomplete dominance results in a third phenotype between the two parental traits. A red/white flower cross results in pink flowers.
2. Codominance occurs when both alleles are fully expressed in the phenotype, such as black and white fur in a spotted cow.
3. Multiple alleles exist for a single trait, like multiple coat color genes in animals.
4. Polygenic traits are influenced by multiple genes, such as human skin color.
5. Sex-linked traits are carried on the X or Y chromosome, so males usually exhibit the trait since they only have one X chromosome. Color blindness is given as an example
geneticsfirstco.ppt
This document discusses several types of non-Mendelian inheritance patterns:
1. Incomplete dominance results in a third phenotype between the two parental traits. A red/white flower cross yields pink flowers.
2. Codominance occurs when both alleles are fully expressed in the phenotype, such as black and white fur in a spotted cow.
3. Multiple alleles exist for a single trait, like multiple coat color genes in animals.
4. Polygenic traits are influenced by multiple genes, such as human skin color.
5. Sex-linked traits are carried on the X or Y chromosome, so males always express recessive X-linked traits while females can be carriers. Color blindness is given as an
SCIENCE 9-LESggfhfyuuuugyvgcxxcxcSON 4.pdf
This document discusses several types of non-Mendelian inheritance patterns:
1. Incomplete dominance results in a third phenotype between the two parental traits. A red/white flower cross yields pink flowers.
2. Codominance occurs when both alleles are fully expressed in the phenotype, such as black and white fur in a spotted cow.
3. Multiple alleles exist for a single trait, like multiple coat color genes in animals.
4. Polygenic traits are influenced by multiple genes, such as human skin color.
5. Sex-linked traits are carried on the X or Y chromosome, so males always express recessive X-linked traits while females can be carriers. Color blindness is given as an
nonmendelianlessongenetics.ppt
This document discusses several types of non-Mendelian inheritance patterns:
1. Incomplete dominance results in a third phenotype between the two parental traits. A red/white flower cross yields pink flowers.
2. Codominance occurs when both alleles are fully expressed in the phenotype, such as black and white fur in a spotted cow.
3. Multiple alleles exist for a single trait, like multiple coat color genes in animals.
4. Polygenic traits are influenced by multiple genes, such as human skin color.
5. Sex-linked traits are carried on the X or Y chromosome, so males always express recessive X-linked traits while females can be carriers. Color blindness is given as an
Animal Kingdom
The document discusses different genetic concepts including incomplete dominance, codominance, sex-linked traits, polygenic traits, multiple alleles, and blood types. It provides examples and explanations of each concept as well as example genetic crosses and scenarios to illustrate the concepts.
Genetic Crosses
The document discusses different genetic concepts including incomplete dominance, codominance, sex-linked traits, polygenic traits, multiple alleles, and blood types. It provides examples and explanations of each concept as well as example genetic crosses and scenarios to illustrate the concepts.
Genetic Crosses
This document discusses several genetics concepts including incomplete dominance, codominance, sex-linked traits, polygenic traits, multiple alleles, and blood types. It provides examples and explanations of each concept as well as example genetics problems related to traits in cats and humans.
Exceptions to mendel's laws
1) A test cross can reveal the genotype of an organism showing a dominant trait by crossing it with an individual expressing the recessive trait. The results will indicate if the trait is homozygous dominant or heterozygous.
2) Exceptions to Mendel's laws include co-dominance where alleles are equally expressed, incomplete dominance where alleles are blended, multiple alleles where there can be more than two alleles for a trait, and lethal genes where a homozygous genotype results in death.
3) Examples include roan cattle coats which are both red and white from co-dominant alleles, pink snapdragons from incomplete dominance of red and white alleles, and mouse coat color where yellow is lethal in
Heredity: inheritance and variation LESSON IN SCIENCE 9
This document discusses several types of non-Mendelian genetics inheritance patterns:
1) Incomplete dominance results in a blended phenotype between two traits when hybrids are formed rather than one trait dominating. An example is red and white flowers producing pink hybrids.
2) Codominance occurs when both alleles are fully expressed together in the hybrid phenotype. For example, a black and white cow producing a spotted hybrid.
3) Multiple alleles exist for a single trait, such as multiple coat color alleles in many animals.
4) Polygenic traits are influenced by multiple genes interacting together, like human skin tone.
5) Sex-linked traits involve genes on the sex chromosomes. Examples include color blindness,
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Heredity: inheritance and variation LESSON IN SCIENCE 9
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Incomplete and codominance
- 2. What is codominance? • When two alleles are BOTH expressed together Example: blood type – Blood type A = blood cells with A proteins – Blood type B = blood cells with B proteins – Blood type AB = blood cells with A and B proteins
- 3. Processing Piece: • Write “incomplete dominance.” Circle “co” and write “together.” • Draw a picture to illustrate codominance. Example: Different blood types Example: A flower with red and white spots
- 4. What is incomplete dominance? • Two alleles are blended to produce a “blended phenotype” Example: color in snapdragon flowers – WW = white – WR = pink – RR = Red
- 5. Processing Piece: • Draw a picture to illustrate incomplete dominance. Example: White, red, and pink flowers
- 6. Sample Questions 1 and 2: Cow traits: BB = black BW = black and white WW = white 1) Is this an example of incomplete dominance or codominance? 2) Two black and white cows are crossed. What are possible phenotypes, and their %’s, for the offspring? (Draw a Punnet Square.)
- 7. Sample Questions 3 and 4: Cow traits: BB = black BW = grey WW = white 3) Is this an example of incomplete dominance or codominance? 4) A black cow and a grey cow are crossed. What are possible phenotypes, and their %’s, for the offspring? (Draw a Punnet Square.)
- 8. Sample Questions 5 and 6: Human traits: DD = fatal Dd = dwarfism dd = normal 5) Is this an example of incomplete dominance or codominance? 6) A man of normal height marries a woman who is a dwarf. What are possible phenotypes, and their %’s, for their kids? (Draw a Punnet Square.)
- 9. Exit Ticket Label each of the following as codominance or “incomplete dominance.” 1) Blood type A x Blood Type B Blood Type AB 2) Red flower x White flower Pink flower 3) Red flower x White flower Red & White flower
Editor's Notes
- Another example: a cat with black and tan fur, or a flower with red AND white spots
- Remember! Step 1 = find the genotypes of the parents!!
- Remember! Step 1 = find the genotypes of the parents!!
- Remember! Step 1 = find the genotypes of the parents!!