In guinea pigs black B is dominant to white b coloring If tw

In guinea pigs black (B) is dominant to white (b) coloring. If two guinea pigs are mated and produce 24 black and 26 white offspring, what would you predict the genotypes of the parents to be? bb times Bb bb times bb BB times BB BB times bb BB times Bb

Solution

Answer:

BB (Black): Homozygous dominant

Bb (Black): Heterozygous dominant

bb (White): Homozygous recessive

offsprings are 24 black and 26 white,, the phenotype is almost 1:1 ratio

we will see all possibities,

1) bb x Bb,   possible genotypes are : bB, bb, bB,bb, so, 2 Black and 2 white ,   1:1

2) bb x bb, possible genotypes are : bb, bb, bb, bb,   so, all are white

3) BB x BB, Possible genotypes are : BB, BB,BB,BB, so all are Black

4) BB x Bb, possible genotypes are : BB. BB, BB, Bb, so all are Black

5) BB x bb, possible genotype are : Bb,Bb, Bb, Bb, so all are Black

6) Bb x Bb, possible genotype are : BB, Bb,Bb,bb, 3 Black and one white

so, finally, answer is

a) bb x Bb,   possible genotypes are : bB, bb, bB,bb, so, 2 Black and 2 white ,   1:1