What is the definition of epistasis?(1 point) Responses
when one gene affects multiple phenotypes
when one trait is determined by multiple genes
when a dominant allele for a specific trait is not completely expressed over the recessive allele
when the allele of one gene interferes with the expression of another gene
when the allele of one gene interferes with the expression of another gene
Which is an example of codominance?(1 point) Responses
black and yellow coat color in Labrador retrievers
tall and short plant heights
seed shape in pea plants
black and brown spotted coat color in horses
black and white spotted coat color in cows
pick one of the given responses please
black and yellow coat color in Labrador retrievers
The definition of epistasis is when the allele of one gene interferes with the expression of another gene. To arrive at this answer, we can break down the options provided and understand their meanings.
Option 1: "when one gene affects multiple phenotypes" refers to the concept of pleiotropy, where a single gene can influence multiple traits or characteristics. This is not the definition of epistasis.
Option 2: "when one trait is determined by multiple genes" describes the concept of polygenic inheritance, where a particular trait is influenced by the combined effects of multiple genes. Although this is related to genetics, it is distinct from the definition of epistasis.
Option 3: "when a dominant allele for a specific trait is not completely expressed over the recessive allele" is the definition of incomplete dominance, where a heterozygous individual expresses a phenotype that is intermediate between the two homozygous phenotypes. This is not the definition of epistasis.
Option 4: "when the allele of one gene interferes with the expression of another gene" accurately defines epistasis. Epistasis occurs when the presence of one gene (or its allele) affects the expression or phenotypic outcome of another gene.
Therefore, the correct definition of epistasis is when the allele of one gene interferes with the expression of another gene.