Question

In the context of hereditary diseases, consider the following statements:

1. Passing on mitochondrial diseases from parent to child can be prevented by mitochondrial replacement therapy either before or after in vitro fertilization of egg.

2.  A child inherits mitochondrial diseases entirely from mother and not from father. 

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

Answer 1

Correct option is (b) 2 only

• This is from the Three parent baby news topic from 2016. Basically the mother has faulty Mitochondrial DNA. so the baby will have a disease. So, to prevent it, you've to remove the mother's egg's nuclear material transfer it to another woman's egg, then fertilize that second woman's egg with the father's sperm.
• So, statement#1 is wrong Because This step has to be done before fertilization.
• This disease comes because of mother.
• So, Final Answer "B" : 2 Only