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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.
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Question Type: Memory
(964)
Difficulty Level: Easy
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Topics: Genetics
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Subject: Biology
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A marine cartilaginous fish that can produce electric current is:
- Due to plasmolysis, the plant cell
- Rapid decline in the population, due to high mortality rate, is called
- Which body of the Government of India regulates GM research and safety of introducing
- In a minute normal man respires
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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