In an animal assume that rough coat (R ) is domiant over smooth coat (r ) and the black (B) is dominant over white (b). Consider that these two pairs of alleles assort independently then
(i) What proportion of the offspring from the cross `RrBb xx "RRBB"` would be rough and black ?
(ii) From the cross `RrBB xx rrBB` . how many progeny will be homozygous for both of the characters ?

Explanation

(i) `:. 100%` offspring will be rough - black.
(ii)
`:.` progeny with homozygous for both of the character `(rrBB) = 1/2= 50%`