Question

Two genes R and Y are located very close on the chromosomal linkage map of the maize plant. When RRYY and rryy genotypes are hybridized, the $F_2$ segregation will show:

• A. Segregation in the expected 9 : 3 : 3 : 1 ratio.
• B. Segregation in 3 : 1 ratio.
• C. Higher number of the parental types.
• D. Higher number of the recombinant types.

Answer 1

The correct option is C Higher number of the parental types.

The law of independent assortment is not applicable when two genes are close together on the same chromosome, i.e., when the genes are linked.