Question

State whether the following is true or false.

If both parents are carriers ofthalassaemia, they need genetic counselling as there is 50% chance ofthe child being thalassaemia major.

Answer 1

This statement is false.

Explanation:

• When both parents are carriers, each child has a 25% chance of thalassaemia major.
• The chance of being a carrier is 50%, which is different from the chance of being affected.