Question

A cross is made between heterozygous black and homozygous brown mice. Give the genotype and phenotype of offspring that may be produced from this cross. Given that black colour is dominant over brown colour.​

Answer 1

Answer:

Parents: Bb(Heterozygous) * bb(Homozygous)

Gametes:          B & b                       * b & b

Fertilisation:  

F1 gen:        Bb , Bb , bb & bb

Phenotype:  Black coloured mice(Bb) : brown cloured mice (bb)

                             1 : 1

Genotype:  Heterozygous black mice (Bb) : Brown coloured mice (bb)

                                 1:1