Consider the following statements.I. Phenylketonuria is an autosomal r

1.	Consider the following statements.I. Phenylketonuria is an autosomal recessive trait.II. Thalassemia is an autosomal recessive trait.III. Down’s syndrome is due to the trisomy of chromosome number 21.IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes.The incorrect statement is(a) Only I b) Only II(c) Only III(d) Only IV
Answer» The incorrect statement is : (d) Only IV IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes. The statement IV is incorrect. It is corrected as follows Turner’s syndrome is caused due to the absence of one of the X-chromosomes, i.e. 45 with XO. Such persons are sterile females who have rudimentary ovaries and undeveloped breasts.

Consider the following statements.I. Phenylketonuria is an autosomal recessive trait.II. Thalassemia is an autosomal recessive trait.III. Down’s syndrome is due to the trisomy of chromosome number 21.IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes.The incorrect statement is(a) Only I b) Only II(c) Only III(d) Only IV

Answer»

The incorrect statement is : (d) Only IV

IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes.

The statement IV is incorrect. It is corrected as follows Turner’s syndrome is caused due to the absence of one of the X-chromosomes, i.e. 45 with XO. Such persons are sterile females who have rudimentary ovaries and undeveloped breasts.

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