1- The heterozygote (Aa) expresses the phenotypes seen in both homozygotes (AA a

Question

1- The heterozygote (Aa) expresses the phenotypes seen in both homozygotes (AA and aa).

2- The occurrence of individuals that have a particular genotype but not the corresponding phenotype.  Most commonly associated with dominant phenotypes, resulting in carriers of the dominant allele.

3- Independently isolated recessive mutations (M1, M2, and M3 for example) that, when combined in a heterozygote (M1M2, M1M3, M2M3), result in the mutant phenotype. A collection of recessive mutations in the same gene.

4- A gain-of-function mutation causing a gene to be overexpressed or to encode an overactive protein. Usually inherited as a dominant mutation.

Explanation / Answer

Ans1)codominance.

Ans2) incomplete penetrance.

Ans3) complementation group

Ans4) hypermorphic mutation

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