QUESTION 9 What is the genetic phenomenon when a person has a specific genotype but phenotypically presents otherwise due to a masking effect caused by another gene? O a. Epistasis O b. Incomplete dominance O c. Expressivity O d. Hypostasis Oe. Penetrance
In order to create a phenotypic outcome that cannot be expressed by a sigle gene attributed to the individual loci, genetic variation at two or more loci must interact. This phenomenon is known as epistasis. Similar to how a completely dominant allele conceals the expression of its recessive counterpart, some genes act as a mask for the expression of other genes. The term "epistatic gene" refers to a gene that suppresses the phenotypic effects of a different gene; the hypostatic gene is the gene it subordinates.
When none of a gene's components are dominant, a heterozygous dominant person's phenotype is a combination of dominant and recessive traits. We refer to this as incomplete dominance.
The proportion of animals having a particular genotype that exhibit the phenotype linked to that genotype is known as the penetration rate. The expression level of a given genotype as a phenotype within an individual is referred to as expressivity.
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