Question

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

Answer 1

Hint: The chromosomes contain the genetic material are the sources of passing of hereditary information from one generation to another as well as play an important role in the determination of sex in animals. THe sex determination system helps to identify the chromosomal number of a species and possible heredity involved in the formation of eggs and sperms.

Complete answer:
Grasshoppers belong to the suborder Caelifera of the phylum Arthropoda and are ground dwelling insects. They possess powerful hind legs which are suitable for leaping. They are also known as locusts.

In grasshoppers the sex determination system is known as XX/XO system. The male grasshoppers carry a single sex chromosome which is the X chromosome. The male grasshoppers are considered as XO. The O shows the lack of a second X chromosome. The males are considered as heterogametic sex. The males are known to produce two different types of sperm cells. One type of the sperm cells contains the X chromosome while the other type does not contain the X chromosome. The sex of the offspring is determined by the type of the sperm cell which may lack the X chromosome.

Female grasshoppers are homogametic in nature because they carry two X chromosomes and are known as XX. Thus, the sex of the offspring is determined by the type of chromosome present in the sperm cells. Therefore, in grasshoppers the diploid chromosome number in male is 23 and in females it is 24.

In humans, the male sex is represented by the XY chromosomes containing two types of chromosomes which are X chromosomes and Y chromosomes. THe Y chromosomes are the determiner of the sex of the offspring.

In males, Y chromosomes is one of two chromosomes present and determines the male sex. In certain abnormal cases, an extra Y chromosome can be present and affects the males.

In humans, females are homogametic and contain two sets of X chromosomes. Females are XX. They carry identical X chromosomes and produce ovum containing only one type of chromosome.

Hence, the correct answer is option (B).

Note: The sex determination system in grasshoppers is based on the presence of X chromosomes. In male grasshoppers, the chromosomes are a single X chromosome and it produces two types of sperm cells in which one type of sperm cell contains the X chromosomes while the other cells lack the X chromosomes. The diploid chromosome number in grasshoppers are 23.