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

1. A. segregation in the expected 9 : 3 : 3 : 1 ratio
2. B. segregation in 3 : 1 ratio
3. C. higher number of the parental types
4. D. higher number of the recombinant types.

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