Question

Question #618fe

Answer 1

It is explained below

Explanation:

Father AO and mother BO blood group (assumed):

AB: 25%
AO: 25%
BO: 25%
OO: 25%

Father AA and mother BB (assumed):
AB: 100%

Father AO and mother BB (assumed):
AB: 50%
BO: 50%

Father AA and mother BO (assumed):
AB: 50%
AO: 50%

Since you did not specify details (such as Rhesus factor, etc). These are the probabilities.

You can check this web site: http://www.endmemo.com/medical/bloodtype.php

Answer 2

56.25%

Explanation:

Considering that we do not know the genome of parents we need to accumulate the probability of A and B allele to come together.

A child has a probability of 56.25% to have AB blood group.

Father can have AA or AO blood type. Thus, the frequency of A antigen donated by the father to offspring is 75%, and O is 25%.
Mother can have BB or BO blood type. Thus the frequency of B antigen contributed by the mother to offspring is 75%, and O is 25%.

the probability of
type AB blood type allele is `75% * 75% = 56.75%`
Here I am looking at the probability of every single allele which can be contributed to the offspring. We are looking at the allele A and B being contributed to the offspring. In other words, we are saying, the percentage of allele A is contributed to offspring by the father and percentage of allele B is contributed by the mother.
type O blood type allele is `25%*25% = 6.25%`
type B blood type allele is `25%*75% =18.75%`
type A blood type allele is `25%*75%=18.75%`