Question

Which one is correctly matched?

Options

• Down’s syndorome-44 autosomes + XO

• Klinefelter’s syndrome-44 autosomes + XXY

• Erythroblastosis foetalis-X-linked

• Colour blindness-Y-linked

Answer 1

Klinefelter’s syndrome-44 autosomes + XXY

Explanation:

Klinefelter’s syndrome has 44 autosomes and XXY sex chromosomes. Down’s syndrome is trisomy 21, erythroblastosis foetalis is not X-linked, and colour blindness is usually X-linked.