Question

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

• A. XO condition in human as found in Turner syndrome, determines female sex
• B. XO type of sex chromosomes determines male sex in grasshopper
  
• C. Homozygous sex chromosomes (ZZ) determine female sex in birds
• D. Homozygous sex chromosomes (XX) produces male in Drosophila
  

Answer 1

The correct option is B XO type of sex chromosomes determines male sex in grasshopper


A sex-determination system is a biological system that determines the development of sexual characteristics in an organism.

The sex determination can be described through XO type of sex determines male sex in grasshopper.

In grasshopper, XO type of sex determination is present, the female produces two gametes with X chromosomes while the male produces gametes with X chromosomes and gamete with no sex chromosomes. The gamete with X and without sex chromosome fuses to form a male. Thus, the correct answer is option B.