Question

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridised then $F_2$- generation will show

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

Answer 1

The correct option is D Higher number of parental types

When the linked genes are situated quite close, the chances of crossing over are highly reduced. Due to this, a large number of parental gametes are formed and only a few recombinant gametes are formed. This results in higher number of parental types in the F2 generation as compared to recombinants.