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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: - IAA and serotonin are derived formed from which of the following
- The genetic defect-Adenosine deaminase (ADA) deficiency may be cured permanently by:
- The peg like process in the axis that allows the rotatory movement of the skull is
- The signals for parturtition originate from
- An outer covering membrane is absent over
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
- IAA and serotonin are derived formed from which of the following
- The genetic defect-Adenosine deaminase (ADA) deficiency may be cured permanently by:
- The peg like process in the axis that allows the rotatory movement of the skull is
- The signals for parturtition originate from
- An outer covering membrane is absent over
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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