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NEET2012ZoologyPrinciples of Inheritance and VariationActual

Assertion : A middle aged woman is reported to have small breasts and undersized uterus. Reason : Her genotypic analysis shows XO condition of allosomes.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion

Step-by-step solution

Females having 45 chromosomes (2 ~A + X 0) are affected with Turner's syndrome. Individuals having Turner's syndrome have female sexual differentiation but ovaries are rudimentary. Other associated phenotypes of this condition are short stature, webbed-neck, broad chest, lack of secondary sexual characteristics and sterility. Thus, any imbalance in the copies of the sex chromosomes may disrupt the genetic information necessary for normal sexual development.

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