A father has dimples, the mother does not have dimples, and one of their three c

Question

A father has dimples, the mother does not have dimples, and one of their three children have dimples but the other two do not. Dimples (D) are dominant over no dimples (d). Give the probable genotypes of all five persons concerned. Explain the process you would use to tell if an F2 seed that appeared to have the dominant phenotype was homozygous dominant or heterozygous. Both the husband and wife have normal vision The wife gives birth to a color -blind daughter. What can you deduce about the girl's parentage? Explain why.

Explanation / Answer

2) as dimple is dominant over no dimples then the father will have the genotype ( Dd) and mother (dd) as she has no dimples.The child who have dimple will be (Dd) and other two having no dimples ( dd).

3) we will cross our F2 plants with the recessive one if we get all dominant type plants that means our seed is homozygous and if we get both recessive and dominant plant it means it is heterozygous.

4) colour blindness is a X linked recessive disorder it means for a girl to be colour blind she must possess two diseased XX chromosome but here it is given that both the parents have normal vision.If we assume that the mother is the carrier than also her daughter can be carrier but son will be diseased.so in this case there is no chance of daughter being diseased.son will be diseased.the genotype of the parent will be father( XY) and mother ( Xc X)..

3)

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