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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 correctly describes the...

Which one of the following conditions correctly describes the manner of determining the sex in the given example?

Options

  1. AXO type of sex chromosomes determine male sex in grasshopper
  2. BXO condition in humans as found in Turner syndrome, determines female sex
  3. CHomozygous sex chromosomes (XX) produce male in Drosophila
  4. DHomozygous sex chromosomes determine female sex in birds

Correct answer

A. XO type of sex chromosomes determine male sex in grasshopper

Step-by-step solution

Grasshopper is an example of XO type of sex determination in which the males have only one X\mathrm{X}-chromosome besides the autosomes, whereas females have a pair of X-chromosomes.
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