Question

In mice, black coat colour (allele B) is dominant to brown
coat colour (allele b). The offspring of a cross between a
black mouse (BB) and a brown mouse (bb) were allowed
to interbreed. What percentage of the progeny would
have black coats?
(a) 25%
(b) 50%
(c) 75%
(d) 100%​

Answer 1

Answer:

c

Explanation:

The cross between black mouse (BB) and a brown mouse (bb) and the inbreeding of their hybrid progeny is shown below.

Hence, phenotypic ratio is 3 black: 1 brown i.e. 75% of the progeny would have black coat.

Answer 2

Answer:

The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to interbreed. What percentage of the progeny would have black coats ? Hence, phenotypic raio is 3 black : 1 brown i.e, 75 % of the progeny would have black coat.