Question

Which of the following crosses would produce a normal female progeny and a haemophilic female progeny in the F${{}_1}^{}$ generation?

• A. Carrier female X normal male
• B. Carrier female X haemophilic male
• C. Normal female X haemophilic male
• D. This condition is not possible in a single generation

Answer 1

The correct option is D This condition is not possible in a single generation

Let us try to perform all the crosses one by one to find out whether the given combination is possible or not.
Let’s perform another cross where a haemophilic woman is married to a haemophilic man and have a look at the results.
After performing all the possible crosses we could arrive at the conclusion that a normal female and haemophilic female cannot be present together in a single generation. Hence, option d is correct.