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NEET2007ZoologyPrinciples of Inheritance and VariationActual

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes ore hybridized, the F ₂ segregation will show:

Options

  1. Asegregation in the expected 9: 3: 3 : 1 ratio
  2. Bsegregation in 3:1 ratio
  3. Chigher number of the parental types
  4. Dhigher number of the recombinant types.

Correct answer

C. higher number of the parental types

Step-by-step solution

When the linked genes are situated quiteclose, the chances of crossing over arehighly reduced. Due to this, large number of parental gametes are formed and only few recombinant gametes are formed. This results in higher number of parental typesin F ₂ generation as compared to recombinants.

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