Answer:
1/4 suffer from hemophilia
1/4 are heterozygous
Explanation:
So since they are normal but their son isn't it is assumed that the mom is the carrier since the dad has to be X^HY
X^HY x X^HX^h
Set up a pedigree
X^HX^H X^HX^h
X^HY X^hY
1/4 suffer from hemophilia (X^h)
1/4 are heterozygous (X^HX^h)
The first is A second is C
Answer: Adaption (I think)
Explanation: Certain living organisms and animals can adapt to harsh environmental conditions, and if I'm not wrong, cells can adapt, as well.
The antigens that are on the blood A antigens, B antigens and the Rh if it is a positive or negative