Back to Directory
NEET BIOLOGYMedium

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

A

XO type of sex chromosomes determines male sex in grasshopper

B

XO condition in humans as found in Turner syndrome, determines female sex

C

Homozygous sex chromosomes (XX) produce males in Drosophila

D

Homozygous sex chromosomes (ZZ) determine the female sex in birds

Step-by-Step Solution

  1. Grasshopper: Exhibits XO type sex determination. Males have only one X chromosome (XO) besides autosomes, whereas females have a pair of X-chromosomes (XX). Therefore, the XO condition determines the male sex .
  2. Birds: Exhibit female heterogamety (ZW) and male homogamety (ZZ). Thus, ZZ determines the male sex, not female , .
  3. Drosophila: Exhibits XY type sex determination where females are XX and males are XY .
  4. Turner's Syndrome: While individuals with Turner's syndrome (XO) are sterile females, this is a chromosomal disorder (aneuploidy) rather than a natural sex-determination mechanism like the XO type in grasshoppers.
Practice Mode Available

Master this Topic on Sushrut

Join thousands of students and practice with AI-generated mock tests.

Get Started