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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: - Pheretima and its close relatives derive nourishment from :
- The water of green coconut is
- The process of formation of blood corpuscles is called
- Which one of the following elements is not an essential micronutrient for plant growth?
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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
- Pheretima and its close relatives derive nourishment from :
- The water of green coconut is
- The process of formation of blood corpuscles is called
- Which one of the following elements is not an essential micronutrient for plant growth?
- Limbless amphibians belong to the order
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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