Question

In beta fish, a blue tail (B) is dominant over a black tail (b) and a metallic sheen (M) is dominant

Answer 1

Answer:

D) 8 blue tail nonmetallic: 8 black tail nonmetallic

Explanation:

The first thing to realize about the problem is that all offspring will be nonmetallic. Both parents are pure recessive for nonmetallic tails; therefore, their offspring cannot have metallic tails. So to find the ratio, use a simple punnet square with Bb and bb. This results in a 50% chance of Bb (blue) and 50% bb (black). So the last answer is correct.