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What does non-Mendelian inheritance describe?
What does non-Mendelian inheritance describe?
What is incomplete dominance?
What is incomplete dominance?
What is the probability of producing pink-flowered plants from a pink and white cross?
What is the probability of producing pink-flowered plants from a pink and white cross?
Which term describes two alleles of a gene expressed together, showing both traits?
Which term describes two alleles of a gene expressed together, showing both traits?
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In chickens, what phenotypic result comes from crossing a black chicken and a white chicken due to codominance?
In chickens, what phenotypic result comes from crossing a black chicken and a white chicken due to codominance?
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What does multiple alleles refer to in genetics?
What does multiple alleles refer to in genetics?
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In the ABO blood group system, which blood type cannot be produced from a homozygous type A parent and a type O parent?
In the ABO blood group system, which blood type cannot be produced from a homozygous type A parent and a type O parent?
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What is the likelihood of getting an individual with type O blood from a type A and type O genotype?
What is the likelihood of getting an individual with type O blood from a type A and type O genotype?
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What type of traits are influenced by two or more genes and do not follow Mendelian inheritance?
What type of traits are influenced by two or more genes and do not follow Mendelian inheritance?
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What is it called when one gene affects the expression of other genes or multiple phenotypic traits?
What is it called when one gene affects the expression of other genes or multiple phenotypic traits?
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In the context of skin pigmentation, what protein is not produced in individuals with albinism due to a gene mutation?
In the context of skin pigmentation, what protein is not produced in individuals with albinism due to a gene mutation?
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What type of dominance is displayed by the chestnut BC and diluting Bc alleles in horses?
What type of dominance is displayed by the chestnut BC and diluting Bc alleles in horses?
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When a heterozygous black-coated rabbit is crossed with a homozygous white-coated rabbit, what phenotypes can the offspring have?
When a heterozygous black-coated rabbit is crossed with a homozygous white-coated rabbit, what phenotypes can the offspring have?
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If skin color in humans is influenced by the dominant alleles A and B, what would the offspring of parents AABb and Aabb potentially inherit in terms of genotypes?
If skin color in humans is influenced by the dominant alleles A and B, what would the offspring of parents AABb and Aabb potentially inherit in terms of genotypes?
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Which blood type offspring would be possible from a cross between a person with blood type O and a person with blood type AB?
Which blood type offspring would be possible from a cross between a person with blood type O and a person with blood type AB?
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What are polygenic traits that are influenced by environmental factors called?
What are polygenic traits that are influenced by environmental factors called?
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Study Notes
Non-Mendelian Inheritance
- Non-Mendelian inheritance involves complex genetic patterns beyond simple dominance.
- It deviates from Mendel's laws of inheritance.
Incomplete Dominance
- In incomplete dominance, both alleles are partially expressed, leading to a blended phenotype.
- It's also known as partial dominance.
- Example: A pink-flowered plant is produced when a red-flowered plant (CRCR) is crossed with a white-flowered plant (CWCW).
Codominance
- Codominance occurs when two alleles are both fully expressed, resulting in distinct traits.
- Example: In chickens, the black allele (Fb) and white allele (Fw) exhibit codominance. Heterozygous chickens (FbFw) have an erminette phenotype, displaying both black and white feathers.
Multiple Alleles
- Multiple alleles refer to more than two alleles for a single gene.
- Example: The ABO blood group system involves three alleles (IA, IB, and i) determining blood type.
Polygenic Traits
- Polygenic traits are influenced by multiple genes and often exhibit continuous variation.
- Example: Human skin color, height, and eye color are polygenic traits with a range of phenotypes.
Pleiotropy
- Pleiotropy occurs when a single gene affects multiple phenotypic traits.
- Example: Albinism is a condition caused by a defect in the tyrosinase gene, leading to a lack of melanin production, affecting skin, hair, and eye color.
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Description
This quiz explores the principles of non-Mendelian inheritance, including incomplete dominance, codominance, multiple alleles, and polygenic traits. Test your understanding of these complex genetic patterns that deviate from Mendel's laws of inheritance. Learn through examples and reinforce your knowledge of genetic diversity.
