Consider the following cross involving the genes for pod color and seed shape:

Question

P generation:
Green pods with round seeds= ____
Yellow pods with wrinkled seeds=____

F1 generation:
1/4 green pods with round seeds= ____
1/4 grens pods with wrinkled seeds=____
1/4 yellow pods with round seeds=____
1/4 yellow pods with wrinkled seeds=____

Options:
Aa Bb
aa bb
Aa bb
aa Bb
AA BB
Aa BB
aa BB
A_ BB
AA Bb
A_ Bb
AA bb
A_ bb
AA B_
Aa B_
aa B_
A_ B_

Remember that the upper-case letter corresponds to the allele with the dominant phenotype. Use the symbols "A" and "a" for pod color and the letters "B" and "b" for seed shape.

In some cases, an individual's genotype could be either "AA" or "Aa" and the data provided do not allow you to distinguish between these possibilities. In that case, we will use the shorthand "A_" to represent "AA or Aa".

Answer 1

The only way that you can get a F1 generation with the phenotype that was described is if the cross between the P1 generation genotypes are Aa Bb x aa bb producing an F1 generation of 1/4-AaBb, 1/4-Aabb, 1/4-aaBb, and 1/4-aabb.

Answer 2

What letter represents the dominant yellow allele