Which of the following is not a constant?
2 answers:
You might be interested in
Answer:
1. Both type A and type O
Explanation:
Blood genotype in humans follow the ABO system. The allele iA (type A) and iB (type B) are co-dominant but both dominant over the allele i (type O). This means that only a human with two i alleles will be type O.
Type A - iAiA or iAi (heterozygous)
Type B - iBiB or iBi (heterozygous)
Type O - ii
In this question, a man with a blood genotype IAi (type A) marries a woman with a blood genotype IAi (type A). Each of the parents will produce a gametes iA and i. Using these gametes in a punnet square (see attached image), offsprings with the following genotype will be produced: iAiA, iAi, and ii.
iAiA and iAi are type A while ii is type O. This means that both type A and type O could be expected in the children of this cross.
