Homework Help

  The mother is blood type O and the father is blood type A. What are the possible...

user profile pic

flashper | eNotes Newbie

Posted September 19, 2013 at 5:07 PM via web

dislike 0 like

  The mother is blood type O and the father is blood type A.

What are the possible blood types of the offspring?

1 Answer | Add Yours

user profile pic

orchid101 | College Teacher | (Level 1) Associate Educator

Posted September 19, 2013 at 5:59 PM (Answer #1)

dislike 0 like

In matings between Rh-positive and Rh-negative individuals, two parents have been observed among the off-springs. If the Rh-positive parent is homozygous (RR), then all the children will be Rh-positive, even though they are heterozygous (Rr). If, however, Rh-positive parent is heterozygous (Rr),  then one half of the offspring are expected to be Rh-positive (Rr) and the other half Rh negative (rr).

The possible genotypes of the mother will be OO and OO and the possible genotypes of the father will be AA and AO. The mother is homozygous because she consists of same alleles of type A. The father may be heterozygous with one allele of type A and one allele of type O or may be homozygous with two alleles of type O. The possible blood types of the offspring will be A or O, if the father is heterozygous or will be A, if the father is homozygous.

Sources:

http://www.biology.arizona.edu/human_bio/problem_sets/blood

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes