A Homozygous Strain of Corn That Produces Yellow Kernels Is

Multiple Choice

A homozygous strain of corn that produces yellow kernels is crossed with another homozygous strain that produces purple kernels. When the F₁ are interbred, 280 of the F₂ are yellow and 70 are purple.

A) If kernel color is controlled by a single gene pair with yellow dominant to purple, what would be the expected ratio of yellow to purple in the F₂?
B) Do the observed data differ significantly from that expected in (a) ? Explain your answer.
C) Provide an alternative explanation for the inheritance of kernel color and evaluate it by comparing the observed data to that expected from your alternative hypothesis.