Question

Color in squash is controlled by epistatic interactions in which color is recessive to no color. At the first locus white squash (W) is dominant to colored squash (w). At the second locus yellow (Y) is dominant to green (y). What is the phenotype of a squash with the genotype wwYy?

Answer 1

Answer:

A squash with the genotype wwYy will have yellow color.

Explanation:

In epistatic interactions, the combinations of alleles in one genes affects the expression of another gene.

In squash, if the individual's genotype for the first locus is WW or Ww the color will be white, regardless of the information in the second locus.

If the first locus has a ww genotype, then squash will have color and we need to look at the second locus: YY or Yy determines yellow color, and yy green color.

A squash with the genotype wwYy will have color (because it's ww) and yellow (because it's Yy).