In the experiment, pure-breed (homozygous) black fur mouse (male) was mated with a pure-breed brown fur mouse (female). The gene for black fur colour was dominated over the gene for brown fur colour. Use crosses to show the possibilities of the results in the first filial generation.

In the experiment, pure-breed (homozygous) black fur mouse (male) was mated with a pure-breed brown fur mouse (female). The gene for black fur colour was dominated over the gene for brown fur colour. Use crosses to show the possibilities of the results in the first filial generation.