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NEETZoologyPrinciples of Inheritance and Variation

Sex determination Example A. XY system 1. Birds B. ZW system 2. Humans C. XO system 3. Grasshoppers D. Haplodiploidy 4. Honeybees

Options

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

Correct answer

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

Step-by-step solution

XY system: Present in humans (males have XY, females have XX). ZW system: Present in birds (males have ZZ, females have ZW). XO system: Present in grasshoppers (males have XO, females have XX). Haplodiploidy: Present in honeybees (males are haploid, females are diploid).

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