Body Fluids and CirculationMedium
Question
Given below are two statements:
Statement I: Down's syndrome is caused by the absence of one of the X-chromosomes.
Statement II: Turner's syndrome is caused by the presence of an additional copy of the chromosomes.
In the light of the above statements, choose the correct answer from the options given below:
Options
A.Statement I is correct but Statement II is incorrect
B.Statement I is incorrect but Statement II is correct
C.Both Statement I and Statement II are correct
D.Both Statement I and Statement II are incorrect
Solution
The cause of genetic disorder-Down's syndrome is the presence of an additional copy of the chromosome number 21 (Trisomy 21).
The cause of genetic disorder-Turner's syndrome is the absence of one of the X-chromosomes; i.e. 45 with X0.
Sol. [Key Concept: Down's syndrome — trisomy of chromosome 21]
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