Question

suppose that cardi b is homozygous for the type B allele, and offset is type "o".
a: parent genotypes _____x_____
B:which blood types could their parents have?
c: list the percentage of offspring that are expected to have each bloodtype:
A Blood ____%
B Blood ____%
AB Blood ____%
O Blood _____&

Answer 1

a) Parent genotypes: I^B I^B x ii

b) Which blood types their parents could have:
- For Cardi B (I^B I^B): each parent must carry a B allele → possible parental phenotypes: B or AB (so combinations like B×B, B×AB, AB×AB).
- For Offset (ii): each parent must carry an i (O) allele → possible parental phenotypes: O, A, or B (so combinations like O×O, O×A, O×B, A×A, A×B, B×B, etc., provided any A or B parent is the heterozygous form I^A i or I^B i). Note: AB cannot be a parent of ii because AB has no i allele.

c) Expected offspring blood types from I^B I^B × ii:
- A Blood: 0%
- B Blood: 100%
- AB Blood: 0%
- O Blood: 0%