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NEETZoologyPrinciples of Inheritance and Variation

Sex determination Description A. XY system 1. Males are haploid, females are diploid B. ZW system 2. Males have one sex chromosome (XO), females have two (XX) C. XO system 3. Males have XY chromosomes, females have XX chromosomes D. Haplodiploidy 4. Males have ZZ chromosomes, females have ZW chromosomes

Options

  1. AA - 3, B - 4, C - 2, D - 1
  2. BA - 1, B - 2, C - 3, D - 4
  3. CA - 4, B - 3, C - 1, D - 2
  4. DA - 2, B - 1, C - 4, D - 3

Correct answer

A. A - 3, B - 4, C - 2, D - 1

Step-by-step solution

XY system: Males have XY chromosomes, females have XX chromosomes. ZW system: Males have ZZ chromosomes, females have ZW chromosomes. XO system: Males have one sex chromosome (XO), females have two (XX). Haplodiploidy: Males are haploid, females are diploid.

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