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Question : Describe the structure of sex chromosomes.

Answer»

SOLUTION :
(1) X-chromosome is longer, sub-metacentric chromosome with large amount of euchromation and smaller amount of heterochromatin.
(2) Y-chromosome is shorter, ACROCENTRIC with small amount of euchromatin and large amount of heterochromatin.
(3) X-chromosome has more GENES and DNA, while Y-chromosome is genetically less active chromosome.
(4) Non-homologous REGIONS of X- and Y-chromosomes contain X-linked and Y-linked genes respectively.


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