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 :
C. Both Statement I and Statement II are incorrect
Down's syndrome is an autosomal aneuploidy caused by the presence of an additional copy of chromosome number 21 (Trisomy 21). Therefore, Statement I is incorrect. Turner's syndrome is a sex chromosomal aneuploidy caused by the absence of one of the X-chromosomes, resulting in a karyotype of 45 with XO. Therefore, Statement II is also incorrect. Both Statement I and Statement II are incorrect. Answer: Both Statement I and Statement II are incorrect
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