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Genetics-i Miscellaneous

  1. A crossing was performed between the genotypes DdEeFfgg and ddEeFfGg. Assuming that the allelic pairs of all genes assort independently, the proportion of progeny having the genotype ddeeffgg is expected to be ____________%.
    1. 1.3 to 1.8
    2. 4.1 to 5.6
    3. 3
    4. None of the above
Correct Option: A

Crossing of DdEeF fgg & ddEeFfGg was performed hence.
Dd × dd : Dd dd Dd dd ie. dd = 0.5
Ee × Ee : EE Ee eE ee i.e. ee = 0.25
Ff × Ff : Ff fF fF ff i.e. ff = 0.25
gg × Gg : gG gg gg i.e. gg = 0.50
∴ ddeeffgg = (0.5) (0.25) (0.25) (0.5)
= 0.0156 = 0.0156 × 100% = 1.56%



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