HEREDITY
CODOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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X R X r
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X R X R
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Xr X r
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X r Y
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X R Y
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Detailed explanation-1: -Therefore the genotype for the female fly is XrXr and the male is XRY.
Detailed explanation-2: -Thus, the genotype of a white-eyed female would be Xw+Xw+ because white eye color is recessive and manifests itself when both the mutant alleles are present. The genotype of a red-eyed male would be XwY as it has wild eye color.
Detailed explanation-3: -A ratio of copulation success is 0.75 for white-eyed male to 1 for wild-type male26. Such a sexual discrimination against white-eyed males eventually results in the elimination of mutant allele from a laboratory population26.
Detailed explanation-4: -In fruit flies, the dominant V allele produces long wings, whereas the recessive v allele produces vestigial wings. Thus, flies with the genotype VV or Vv will have long wings, and flies with the genotype vv will have vestigial wings.
Detailed explanation-5: -There are two different genotypes that code for the red-eyed phenotype (XRXR, XRXr) in females. Males have one genotype that codes for red eyes, XRY. Thus, the Red-eyed Male’s genotype can be determined from its phenotype. However, this is not possible in females.