Question

Which chromosome set is found in male grasshoppers?
A.XY
B.XO
C.YY
D.XX

Answer 1

Hint: Grasshopper is a ground-dwelling insect and it contains 23 chromosomes in case of male and 24 chromosomes in case of females. Grasshopper protects itself by camouflage from the predator animals.

Complete step by step answer:
-Grasshopper contains two main chromosomes that belong to the races in Hokkaido.
-The populations of grasshoppers have a diploid number of chromosomes in both males and females.
-The male spices have 2n = 23 and the female species have 2n = 24 numbers of chromosomes.
-Sex determination can be done by X and Y method.
-As male has 23 numbers of chromosomes – the chromosome set will be XO male.
-As the female has 24 numbers of chromosomes – the chromosome set will be XX female.
-Thus, we can say female grasshopper are homogametic i.e. XX and the male carries only one sex chromosome i.e. XO.

So, the correct answer for this question is option B. XO.

Note:
XX-XO mechanism is the sex determination process that is considered to determine sex in grasshopper. XX-XY mechanism of sex determination is considered in case of human sex determination – where the XX means a female candidate and XY means a male candidate. Some clinical conditions are also seen in the case of humans – for example, XXY shows Klinefelter syndrome.