Question

A.) A child has a genotype 3/4 and a mother with a genotype 4/6. The father has a genotype 2/3. Is he definitely the father? Why or why not?

B.) A child with a genotype 5/9 has a father with genotype 5/7. What is the mother’s genotype?

C.) A child with a genotype 4/10 has a father with a genotype 4/10. What is the mother’s genotype?

Answer 1

A. The man who has a genotype 2/3 may be the father as he can donate allele 3 to to the child and the child already got allele 4 from his mother. The child's genotype thus become 3/4.

B. The Mother's genotype may be 7/9 . The child receive allele 5 from his father and allele 9 from his Mother. So the genotype of the child became 5/9.

C The Mother's genotype may also be 4/10. The child has received allele 4 from either father or mother and the allele 10 from the remaining parent who have not donated allele 4.