Question

Which of the following set of syndromes show $47$ chromosomes in their genetic make up

• A. Downs syndrome, Pataus syndrome, Edwards syndrome
• B. Turners syndrome, Edwards syndrome, Klinefelters syndrome
• C. Klinefelters syndrome, Turners syndrome, Edwards syndrome
• D. All of the above

Answer 1

Answer: (A)

Downs syndrome ($21$ -trisomy) Pataus syndrome ($13$ -trisomy) and Edwards syndrome ($13$ -trisomy) all show $47$ chromosomes in their genetic make up. Turners syndrome has $45$ chromosomes and Klinefelters syndrome has also $47$ chromosomes.