Two fruit flies with blue eyes are mated and produce 973 fli

Two fruit flies with blue eyes are mated and produce 973 flies with blue eyes and 464 wild-type flies. a. the wild type allele is a recessive lethal allele b. the mutant allele is a recessive lethal allele c. the mutant allele is a dominant lethal allele d. the wild type allele is a dominant lethal allele In a disputed parentage case, a child is blood type B, while the mother is blood type A. What blood type could exclude a male from being the father? a. A b. O c. AB d. A and O e. A, O, and AB

Solution

Answer:

1)

c. The mutant allele is a dominant lethal allele

AA= blue but lethal

Aa= blue, alive

aa= wild

Aa x Aa ------------Parents

AA (1/4), Aa (1/2), aa (1/4)

2). d). A and O

Blood B genotype would I^BI^B or I^Bi

Blood A genotype would be I^AIAor I^Ai

Blood O genotype would be ii

Blood AB genotype would I^AI^B

If the child is B( I^Bi) and the mother is A( I^Ai) and father is only AB (I^AI^B) from the options. So we can exclude blood type A & O.