Question

A person having $45$ chromosomes and $Y$ chromosome absent, is suffering from :

• A. Downs syndrome
• B. Klinefellers syndrome
• C. Turners syndrome
• D. Gynandromorph

Answer 1

Answer: (C)

A person having $45$ chromosomes instead of $46$ due to lack of $Y$ chromosome are suffering from Turners syndrome. They are $XO$ individual, usually formed by an $X$ carrying sperm, fertilising an $O$ egg. Such indiviuals are undeveloped females. They may not menstruate.