A scientist discovered the genetic basis of color variation in the medaka that i
ID: 67372 • Letter: A
Question
A scientist discovered the genetic basis of color variation in the medaka that is a small fish. Genes at two loci (B, b and R, r) determine the color of the fish. If the fish have a dominant allele at both loci (B -/R -), they are brown. Fish with a dominant allele at the B locus only (B-/rr) are blue. Fish with a dominant allele at the R locus only (bb/R-) are red and fish with recessive alleles at both loci (bb/rr) are white. For the given parental genotypes, determine the offspring genotypes. Show all work. a. Bbrr X bbrr b. Bbrr X BbRr c. BbRr X bbRr
Explanation / Answer
Given that-
BB/RR- brown
BB/rr- blue
bb/RR- red
bb/rr- white
a. BbrrX bbrr
b. Bbrr X BbRr
c. BbRr X bbRr
Br Br br br br Bbrr Bbrr bbrr bbrr br Bbrr Bbrr bbrr bbrr br Bbrr Bbrr bbrr bbrr br Bbrr Bbrr bbrr bbrr