Question

in peas, yellow seed color (y) is dominant to green seed color (y). a homozygous green seed pea plant is crossed with a heterozygous yellow seed pea plant. what is the predicted phenotypic ratio of the offspring based on seed color? 50 percent yellow, 50 percent green 50 percent yy, 50 percent yy 100 percent yellow, 0 percent green 100 percent yy, 0 percent yy

Explanation:

• A homozygous green seed pea plant has the genotype \(yy\).
• A heterozygous yellow seed pea plant has the genotype \(Yy\).
• When \(yy\times Yy\) is crossed:
• The possible gametes from \(yy\) are \(y\) and \(y\).
• The possible gametes from \(Yy\) are \(Y\) and \(y\).
• Using a Punnett square:
• \(y\times Y = Yy\) (yellow phenotype as \(Y\) is dominant).
• \(y\times y = yy\) (green phenotype).
• So, half of the offspring (\(50\%\)) will have the genotype \(Yy\) (yellow) and half (\(50\%\)) will have the genotype \(yy\) (green).

Answer:

50 percent yellow, 50 percent green