Mental retardation in humans,associated with sex chromosomal abnormality,is usually due to:

  • A
    Reduction in $X$ complement
  • B
    Increase in $X$ complement
  • C
    Moderate increase in $Y$ complement
  • D
    Large increase in $Y$ complement

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Aneuploidy refers to . . . . . . .

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$A$ male individual with $47$ chromosomes due to the addition of an $X$ chromosome suffers from a condition called:

The genotype of an individual with Down's syndrome is:

The given figure represents the formation of which type of peptide?

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