Question
Biology Question on Non-Mendelian Genetics
Example of Non-Mendelian disorder:
A
Cystic fibrosis
B
Haemophilia
C
Down’s syndrome
D
Thalassemia
Answer
Down’s syndrome
Explanation
Solution
Down's syndrome is caused by the presence of an extra copy of chromosome 21, known as trisomy 21. It is not inherited in a Mendelian pattern, which typically involves the transmission of a single gene from parents to offspring. Instead, Down's syndrome occurs due to a random error during the formation of reproductive cells or early embryonic development.