Question

A blue fowl obtained from mating between black and white fowls, is selfcrossed. The $F_2$ ratio is

• A. 1 black : 2 white : 1 blue
• B. 2 black : 1 white : 1 blue
• C. 1 black : 2 blue : 1 white
• D. None of the above

Answer 1

Answer: (C)

1 black : 2 blue : 1 white

A black fowl is crossed to white fowl, in the F1 generation, blue fowls are formed. When it is allowed for self crossed, in the F2 generation, 1 black fowl, 2 blue fowl, 1 white fowl progeny are formed. It is called Incomplete dominance.

So, the correct option is ‘ 1black : 2blue : 1white