Thin flat nails (A) and bluish-white nails (B) are dominant features, normal (a) regular (b) nails are recessive.

Thin flat nails (A) and bluish-white nails (B) are dominant features, normal (a) regular (b) nails are recessive. What kind of children can you expect from a marriage between a woman with thin, regular nails and a man with normal bluish-white nails?

a) If the genotype of the mother is AAbb, and the father is aaBB, then all children will have flat bluish-white nails;
b) if the genotype of the mother is Aabb, and the father is aaBB, then 1/2 of the children will have flat bluish-white nails, and 1/2 – normal bluish-white;
c) if the genotype of the mother is AAbb, and the father is aaBb, then 1/2 of the children will have flat bluish-white nails, and 1/2 will have flat ordinary;
d) if the genotype of the mother is Aabb, and the father is aaBb, then the children will have flat bluish-white nails, flat ordinary, normal bluish-white and normal ordinary in a ratio of 1: 1: 1: 1.

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