A rooter with gray feathers was mated with a hen of same phenotype. Among their offspring 15 were gray, 6 black and 8 white. What phenotypes would you expct among the offspring resulting from mating of gray roster and black hen ?

A rooster with gray feathers was mated with a hen of same phenotype. Among their offspring 15 were gray, 6 black and 8 white. What phenotypes would you expect among the offspring resulting from mating of gray rooster and black hen ?

Guniea pig having black colour when crossed with guinea pig having same colour produced 80 offsprings, out of which 60 were black and 20 were whie. Now, find out a] What is the possible genotype of the guinea pigs? b] Which traits is dominant and which traits is recessive? c] What is this cross called as and what is its phenotypic ratio?

A black mouse mates with a brown mouse, and all the offsprings are back. (a) Why are no brown offsprings produced ? (b) If two of the black offpsrings mate with each other what kind of offspring would you expect and in what proportions ? Give reason for your answer.