50% of the offspring of Pooja’s brother are green eyed. With help of cross show how this is possible.
Answer:
50% of Pooja’s brother’s offspring have Green Eyes.
We know that Pooja’s brother’s genotype is Bb.
For the offspring to have green eyes the mother would have to have Bb or bb type genotype.
Case 1: Bb*Bb
| B | b | |
| b | Bb | bb |
| b | Bb | bb |
Here, the chance of green eyes appearing in offspring is 25%.
Case 2: Bb*bb
| B | b | |
| b | Bb | bb |
| b | Bb | bb |
Here, there is a 50% chance their offspring will have green eyes.
Therefore,
50% of the offspring can have green eyes as per the cross shown in case 2.
