Question

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized the `F_(2)` segregation will show
A. higher number of the recombinant types
B. segregation in the expected 9 : 3 : 3 : 1 ratio
C. segregation in 3 : 1 ratio
D. higher number of the parental types

Answer 1

Correct Answer - D
Higher number of the parental types formed when RRYY and rryy genotypes are hybridised giving the condition that R and Y genes are closely linked. Law of independent assortment does not applicable when the gene of different character occupy the same homologous chromosome i.e. are linked gene.