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NEET Biology question

BiologyPrinciples of Inheritance and VariationNEET

In Down's syndrome of a male child, the sex complement is

Answer: (B)

Solution

Down's syndrome is an autosomal trisomy (trisomy of chromosome 21) and does not involve any abnormality of the sex chromosomes. A male child with Down's syndrome therefore still has the normal male sex-chromosome complement, XY, with

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Question ID VK-120178