Question
CAN SOMEONE SOLVE THIS QUESTION #6 a,b, and c.
6. For the fish model organism Medaka (Aplocheilus latipes), genes at 2 color of the fish. Fish that have the dominant allele at both loci (E loci (B, b and R, r) determine brown, fish with a dominant at the B locus (B rr) are blue, fish with a dominant allele at the R locus only (bb R are red, and R) are fish that are homozygous recessive at both loci (bb rr) are white. a. What is the expected phenotypic ratio of offspring of cross between a homozygous brown and homozygous white Medaka fish? b. What is the expected phenotypic ratio of offspring if you then generate an F2 generations progeny above? from the
Explanation / Answer
BBRR X rrbb
brown x white
Possible gametes-BbRr
f1 - BbRr
f2- BbRr X BbRr
Brown(BBRR, BbRr)-9
Blue- (Bbrr,BBrr)-3
Red-(bbRR,bbRr)-3
white-(bbrr)- 1
F2 ratio-
brown : blue: red:white- 9:3:3:1 .
BR Br bR br BR BBRR BBRr BbRR BbRr Br BBRr BBrr BbRr Bbrr bR BbRr BbRr bbRR bbRr br BbRr Bbrr bbRr bbrr