Biology

A is dominant over B

O is recessive

B is dominant over O

A and B are co-dominant

taste PTC

roll the tongue

move the ear

rool the eyeball

A

B

C

AB

O

2

4

6

8

The gene for the spotted coat is recessive to the gen for the black coat

Black coat and spotted coat are co-dominant

The gene for the spotted coat is dominant over the gene for the black coat

the genotype for the F1 are homozygous dominant