Answer:
whats the full answer for b I think its your best bet
I believe that the answer to the question provided above is that the sternal ends of elderly people would be must in curved compared to those who are young.
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Answer: One parent is IAi and the other parent is IBi
Explanation: As this trait is codominant, the child can inherited IA, IB or i.
Tina has type O, which means she is ii and her sister is AB, so her genotype is IAIB. Now, to have a child with a recessive trait both parents has to carry at least one allele for the recessive, i. Rosa is type AB which means she had to have inherited one allele IA from one of her parents and the other IB from the other parent. Thus, one parent is IAi and the other is IBi.
Where is the graph because i cant answer the answer the question without it