The ratio of white to colored chickens that occurs in the F₂ generation of a cross between White Leghorn and White Wyandotte chickens is the result of incomplete dominance and variable expressivity. These are the only explanations as to why a ratio would deviate from Mendel's expected 9:3:3:1 ratio.

Question

Quizplus · Accepted Answer

Incomplete dominance and variable expressivity are not the only two explanations for a ratio to deviate from Mendel's expected ratio. Other factors such as linkage or epistasis can also affect the results of a genetic cross.

The Ratio of White to Colored Chickens That Occurs in the F2

The Ratio of White to Colored Chickens That Occurs in the F₂