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 inheritance. It includes various mechanisms such as incomplete dominance, codominance, polygenic inheritance, and multiple alleles.

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What is Incomplete Dominance?

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Incomplete Dominance is a form of inheritance where the phenotype of the offspring is a blend of the parents' phenotypes. For example, crossing red and white snapdragons results in pink flowers.

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What is Complete Dominance?

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Complete Dominance occurs when one allele completely masks the effect of another allele. For example, in labrador retrievers, the black allele completely masks the brown allele.

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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 offspring with a phenotype that shows both traits. An example is roan cows, which have both red and white hair.

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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. An example is human height, which varies widely among individuals.

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What are Multiple Alleles?

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Multiple Alleles refer to the presence of more than two alleles for a genetic trait. An example is the fur color in rabbits, which is controlled by a single gene with multiple alleles.

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What is the difference between Dominant and Recessive alleles?

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A Dominant allele is one that expresses its trait even in the presence of a recessive allele, while a Recessive allele only expresses its trait when two copies are present.

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What is a Phenotype?

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A 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 a Genotype?

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A Genotype is the genetic constitution of an individual, representing the alleles inherited from the parents.

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What is a Punnett Square?

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A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.