Q. Which one of the following conditions correctly describes the manner of determining the sex in the given example?
A) Homozygous sex chromosomes (XX) produce male in Drosophila
B) Homozygous sex chromosomes (ZZ) determine female sex in birds
C) XO type of sex chromosomes determine male sex in grasshopper
D) XO condition in humans as found in Turner Syndrome, determines female sex
Explanation
[Solution from source] In grasshoppers, males have only one X chromosome (XO) and females have XX, so the XO condition determines the male sex. In Drosophila XX is female, in birds ZZ is male, and in humans sex is decided by the presence or absence of the Y chromosome. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.