Assignment problem:
After several matings of tan-coloured birds, a breeder noted the following average offspring numbers:
24 white, 26 brown and 53 tan birds.
There are only two genes that control feather colour in birds - they are WW- White and BB - Brown with the intermediate or mixed colour being BW - Tan
Draw a Punnet Square that would produce the following results:
25% of all offspring are white
Give phenotypes and genotypes