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NEET2015ZoologyPrinciples of Inheritance and VariationActual

In rabbits, the gene for grey fur (G) is dominant over that for black fur (g). In a litter, if 50 % rabbits are grey, then the possible parental cross combination is

Options

  1. AGG Gg
  2. BG G G G
  3. Cg g g g
  4. DGg gg .

Correct answer

D. Gg gg .

Step-by-step solution

When heterozygous grey individuals ( Gg ) are crossed with homozygous black individuals (gg), then grey and black individuals will be obtained in equal ratio. It is a type of test cross and can be illustrated as:

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