Question

Attached is a Punnett square showing a cross between two parents. Use this information to respond to the question. P generation: BB x bb COMPLETE DOMINANCE: B = black rat b = white rat How would we refer to the parents and the offspring? Punnet Square.png Punnet Square.png Previo A One parent homozygous, one is heterozygous, the offspring are homozygous B One parent is homozygous dominant, one parent is homozygous recessive, the offspring are heterozygous C One parent is homozygous dominant , one parent is heterozygous recessive, the offspring are homozygous dominant D One parent is heterozygous dominant, one is heterozygous recessive, the offspring are heterozygous dominant

Answer 1

As you can see in the Punnet square presented below, the parents' genotypes are BB (homozygous dominant) and bb (homozygous recessive) and all of their offspring have the Bb (heterozygous genotype).
The dominant parent is black, the recessive parent is white and all of the offspring is black, as the B allele is expressing complete dominance.