In cats blood type A results from an allele IA that is domin

In cats, blood type A results from an allele (I^A) that is dominant over an allele (i^B) that produces blood type B. There is no O blood type. The blood types of male and female cats that were mated and the blood types of their kittens follow. Give the most likely genotypes for the parents of each litter. In humans, alkaptonuria is a metabolic disorder in which affected persons produce black urine. Alkaptonuria results from an allele (a) that is recessive to the allele for normal metabolism (A) Sally has normal metabolism, but her brother has alkaptonuria. Sally\'s father has alkaptonuria, and her mother has normal metabolism. Give the genotypes of Sally, her mother, her father, and her brother. If Sally\'s parents have another child, what is the probability that this child will have alkaptonuria? If Sally marries a man with alkaptonuria, what is the probability that their first child will have alkaptonuria? Their second?

Solution

Answer:

4).

A= I^AI^A or I^AI^B

B= I^BI^B

S.No

Male parent genotype

Female parent genotype

a

I^AI^B

I^BI^B

b

I^BI^B

I^BI^B

c

I^BI^B

I^AI^A

d

I^AI^B

I^AI^B

e

I^AI^A

I^AI^A

S.No	Male parent genotype	Female parent genotype
a	IAIB	IBIB
b	IBIB	IBIB
c	IBIB	IAIA
d	IAIB	IAIB
e	IAIA	IAIA