Q183 / 200 · NEET 2023 (Manipur) · Zoology

Select the correct statement/s with respect to mechanism of sex determination in Grasshopper. (A) It is an example of female heterogamety. (B) Male produces two different types of gametes either with or without $\mathrm{X}$ chromosome. (C) Total number of chromosomes (autosomes and sex chromosomes) is same in both males and females. (D) All eggs bear an additional $\mathrm{X}$ chromosome besides the autosomes. Choose the correct answer from the options given below :

  • A
    $(A)$ only
  • B
    $(A)$ and $(C)$ only
  • Correct answer
    C
    $(B)$ and $(D)$ only
  • D
    $(A),(C)$ and (D) only

Solution

Grasshopper shows male heterogamety and chromosomal constituent of male is AA + XO and female is $A A+X X$ Males have lesser number of sex chromosomes as compared to females. Male produce two types of gametes $(\mathrm{A}+\mathrm{X})$ and $(\mathrm{A}+\mathrm{O})$

Hence, the correct answer is option: 'C'.

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