Principles of Inheritance and Variation Question 121
121. Which one of the following conditions correctly describes the manner of determining the sex in the given example?
[2011]
(a) Homozygous sex chromosomes
(b) XO type of sex chromosomes determine male sex in grasshopper
(c) XO condition in human as found in Turner syndrome, determines female sex.
(d) Homozygous sex chromosomes (XX) produce male in Drosophila.
Show Answer
Answer : b
Hints & Solution
(b) In grasshopper, the males lack a Y sex chromosome and have only an X chromosome. They produce sperm cells that contain either an $X$ chromosome or no sex chromosome, which is designated as $O$.
