Question

In peas, the color yellow (Y) is dominant to the color green (y). How many of the four possible outcomes are yellow?

Answer 1

It depends on the situations. In the first situation, a Yy gene crosses with a Yy gene. 3 out of 4 of the outcomes have a capital Y in them, meaning that they have a dominant yellow allele. The bottom-right box has two lower-case y's, so it will be green. In the second situation, a YY gene crosses with a Yy gene. Here, all 4 out of 4 of the outcomes have at least one capital Y, so they will all be yellow. Hope that helps!

Answer 2

because in order to be yellow the only 2 alleles  you can have are the 2