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NEETZoologyPrinciples of Inheritance and Variation

Match List-I with List-II regarding the mechanism of sex determination. List-I List-II (A) Grasshopper (I) Males develop from unfertilised eggs and produce sperms by mitosis (B) Birds (II) Male produces two different types of gametes, either with or without an X chromosome (C) Drosophila (III) Female produces two different types of gametes, one with Z and another with W chromosome (D) Honey bee (IV) Male produces two

Options

  1. A(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
  2. B(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
  3. C(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
  4. D(A)-(III), (B)-(II), (C)-(IV), (D)-(I)

Correct answer

A. (A)-(II), (B)-(III), (C)-(IV), (D)-(I)

Step-by-step solution

Grasshopper exhibits the XX-XO type of sex determination where males are heterogametic (XO) and produce two types of sperms: with an X chromosome and without an X chromosome. This matches (A) with (II). Birds exhibit the ZZ-ZW type of sex determination where females are heterogametic (ZW) and produce two types of ova: with a Z chromosome and with a W chromosome. This matches (B) with (III). Drosophila exhibits the XX-XY type of sex determination where males are heterogametic (XY) and produce two types of sperms: wi

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