Non-Mendelian Genetics

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What is Non-Mendelian Genetics?

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Non-Mendelian Genetics refers to patterns of inheritance that do not follow Mendel's laws of inheritance, including incomplete dominance, codominance, multiple alleles, and polygenic traits.

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What is a carrier in genetics?

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A carrier is an individual who has one copy of a recessive allele that does not manifest in the phenotype but can be passed on to offspring.

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What is hemophilia?

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Hemophilia is a genetic disorder that impairs the body's ability to make blood clots, a process needed to stop bleeding. It is often X-linked.

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What does X-linked inheritance mean?

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X-linked inheritance refers to genes located on the X chromosome. Males (XY) are more likely to express X-linked recessive traits than females (XX).

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What is the expected phenotypic ratio in a monohybrid cross between two heterozygous parents?

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The expected phenotypic ratio is 3:1, where three offspring exhibit the dominant trait for every one that exhibits the recessive trait.

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Define genotype.

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Genotype is the genetic makeup of an organism, representing the alleles inherited from its parents.

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Define phenotype.

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Phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

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What is polygenic inheritance?

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Polygenic inheritance is a type of inheritance where multiple genes influence a trait, resulting in a continuous range of phenotypes, such as human height.

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What is incomplete dominance?

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Incomplete dominance is a form of inheritance where the phenotype of heterozygotes is intermediate between the phenotypes of the two homozygotes.

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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.