Question

In XO type of sex determination
A. Females produce two type of gamete
B. Males produce two type of gamete
C. Females produce gamete with Y-chromosome
D. Male produce gamete with Y-chromosome

Answer 1

Sex determination is generally a biological system that determines the development of sexual characteristics in an organism. Nettie Stevens and Edmund Beecher Wilson are credited with independently discovering, in 1905, the chromosomal sex-determination system.

Complete answer:
The XO type of chromosomes are found in grasshoppers and crickets and some other insects. In this type of insects the females are homogametic, which means they produce only one single type of chromosome that is XX. Hence they are homogametic. While on the other hand the males are heterogametic, which means they produce two different types of gamete that is XO. In XO sex type found in males, there are two different gamete that is with X and without X chromosome. The O signifies the lack of an X chromosome.

Hence, the correct answer is option (B).

Additional information:
The X0 sex-determination system determines the sex of offspring among: most arachnids with the exception of mites where a small majority are haplodiploid, almost all apterygote and Paleopteran insects (e.g. dragonflies and silverfish) most insects, (e.g. grasshoppers, crickets and cockroaches)some nematodes, crustaceans, gastropod molluscs and bony fish.

Note: Several mammals such as:-A few species of bat, including the hammer-headed bat, Buettikofer's epauletted fruit bat, Franquet's epauletted fruit bat, Peters's epauletted fruit bat, and Gambian epauletted fruit bat. And The Ryukyu spiny rat also have XO type of sex determination.