Question

$XO$ chromosomal abnormality in humans causes

• A. Turners syndrome
• B. Downs syndrome
• C. Darwins syndrome
• D. Klinefelters syndrome

Answer 1

Answer: (A)

If O gamete (no X or Y) fuses with X gamete, the resulting XO zygote will survive and form sterile female. This situation is called Turners syndrome.