Question

Which of the folowing is a correct match?

Options

• Down syndrome - 21st chromosome

• Sickle - cell anaemia - X chromosome

• Haemophia - Y chromosome

• Parkinson's disease - X and Y chromosome

Answer 1

Down syndrome - 21st chromosome

Explanation:

Down syndrome is a genetic disease caused by chromosome 21 trisomy. Sickle-cell anaemia is an autosomal recessive inertia disorder, whereas haemophilia is an X-linked disorder. Parkinson's disease is an X-linked disorder.