Question

Which of the following is correct match

• A. Down Syndrome = 21st Chromosome
• B. Sickel cell anaemia = X – Chromosome
• C. Haemophilia = Y – Chromosome
• D. Parkinson Disease = X & Y Chromosome

Answer 1

Answer: (A)

Down Syndrome = 21st Chromosome

Answer 2

The correct option is (A) : Down Syndrome = 21st Chromosome

Trisomy 21, sometimes referred to as Down syndrome (DS or DNS), is a genetic disease brought on by the presence of all or a portion of a third copy of chromosome 21. Physical growth delays, mild to severe intellectual handicaps, and distinctive facial traits are frequently connected with it. A young adult with Down syndrome has an average IQ of 50, which is comparable to an 8- or 9-year-old child's mental capacity, but this can vary greatly. Genetically, the afflicted person's parents are often unaffected. The likelihood rises from less than 0.1% for women under 20 to 3% for those over 45. There is no known behavioral activity or environmental element that alters the probability of the extra chromosome occurring; it is thought to happen randomly.