Non-Mendelian Inheritance

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What is Non-Mendelian Inheritance?

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Non-Mendelian inheritance refers to patterns of inheritance that do not follow Mendel's laws of segregation and independent assortment. It includes various inheritance patterns such as incomplete dominance, codominance, and polygenic inheritance.

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What is a recessive sex-linked trait?

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A recessive sex-linked trait is a trait that is associated with a gene located on the sex chromosomes, typically the X chromosome, and is expressed in males who have only one copy of the allele.

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What is the genotype for a male showing a recessive sex-linked trait?

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X^aY

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What are linked genes?

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Linked genes are genes that are located close together on the same chromosome and tend to be inherited together during meiosis.

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What is incomplete dominance?

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Incomplete dominance is a form of inheritance where the heterozygous phenotype is a blend of the two homozygous phenotypes.

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What is codominance?

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Codominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.

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What is polygenic inheritance?

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Polygenic inheritance is a type of inheritance where multiple genes influence a single phenotype, leading to a range of traits.

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What is the difference between dominant and recessive alleles?

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Dominant alleles are expressed in the phenotype even when only one copy is present, while recessive alleles are only expressed when two copies are present.

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What is an example of codominance?

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An example of codominance is the AB blood type, where both A and B alleles are expressed.

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What is an example of incomplete dominance?

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An example of incomplete dominance is the flower color in snapdragons, where red and white flowers produce pink offspring.