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NEET 2011
Exam
NEET
Year
2011
Subject
Zoology
Chapter
Principles of Inheritance and Variation

NEET 2011 · Zoology · Principles of Inheritance and Variation

Which one of the following conditions of the zygotic cell would...

Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?

Options

  1. ATwo X-chromosomes
  2. BOnly one Y-chromosome
  3. COnly one X-chromosome
  4. DOne X and one Y-chromosome

Correct answer

A. Two X-chromosomes

Step-by-step solution

The sex determining mechanism in case of humans is XY type. Sperms are of two types, one containing X-chromosome and another containing Y-chromosome. The ovum is of one type only, ie, contain X chromosome. The fertilization of ovum with Y-chromosome carrying sperm results into a male offspring.
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