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Down’s syndrome in humans is due to
Options
(a) Two ‘Y’ chromosomes
(b) Three ‘X’ chromosomes
(c) Three copies of chromosomes 21
(d) Monosomy
Correct Answer:
Three copies of chromosomes 21
Explanation:
Down’s syndrome is the chromosomal disorders due to the presence of an additional copy of the chromosome. Number 21 (trisomy of 21). The affected individual is short saturated with small round head, furrowed tongue and partially open mouth and mental development is retarted.
Related Questions: - Excess of which of the following hormones causes Cushing’s syndrome
- Minamata disease first occurred in
- Which of the following are properties of reserved cells
- Active and passive transports across cell membrane differ in
- Uric acid is formed in human from
Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Genetics
(204)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Excess of which of the following hormones causes Cushing’s syndrome
- Minamata disease first occurred in
- Which of the following are properties of reserved cells
- Active and passive transports across cell membrane differ in
- Uric acid is formed in human from
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Genetics (204)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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