Question

minant and recessive
polygenic traits are determined by
intereactions among more than one gene.

for example, kernel color in wheat has
been proposed to be controlled by at least
two genes. in the model shown by the
punnett square, two genes each have a
dominant allele (a or b) and a recessive
allele (a or b).

1. based on the model shown by the

punnett square, what determines kernel
color?

Explanation:

The Punnett Square shows that genotypes with more dominant alleles (A/B) have darker kernel colors: 4 dominant alleles (AABB) give red, 3 give dark, 2 give medium, 1 gives medium, and 0 (aabb) gives white. This demonstrates that the total number of dominant alleles (from both A/a and B/b gene pairs) determines the kernel color, as polygenic traits rely on the combined effect of multiple genes.

Answer:

The number of dominant alleles (A and B) present in the genotype determines wheat kernel color; more dominant alleles result in darker (or redder) kernels, while fewer (or no) dominant alleles result in lighter (or white) kernels.