Down's syndrome is a genetic disorder. It is due to:
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This question was previously asked in
Shift 30/05/2023 12:00 PM - 2:00 PM
A
The presence of an additional copy of the chromosome number 21.
B
The absence of one of the X chromosome.
C
The presence of an additional copy of X chromosome resulting into karyotype of 47 chromosomes.
D
Inborn error of metabolism
Correct Answer
The presence of an additional copy of the chromosome number 21.
Detailed Explanation
Down's Syndrome: The cause of this genetic disorder is the presence of an additional copy of the chromosome number 21 (trisomy of 21). This disorder was first described by Langdon Down (1866). The affected individual is short statured with small round head, furrowed tongue and partially open mouth.
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