In XO type of sex determinationA. Females produce two types of gametesB. Males produce two types of gametesC. Females produce gametes with Y-chromosomeD. Males produce gametes with Y-chromosome

In XO type of sex determinationA. Females produce two types of gametes

1.	In XO type of sex determinationA. Females produce two types of gametesB. Males produce two types of gametesC. Females produce gametes with Y-chromosomeD. Males produce gametes with Y-chromosome
Answer» Correct Answer - B It was also observed that in a large number of insects the mechanism of sex determination is of the XO type, i.e. all eggs bear an additional X-choromosome besides the other chromosomes (autosomes). On the other hand some of the sperms bear the X-chromosome whereas some do not. Eggs fertilised by sperm having an X-chromosome become females and, those fertilised by sperms that do not have an X-chromosome become males. The number of chromosomes in the male and female are not equal. Due to the involvement of the X-chromosomes in the determination of sex, it was designated to be the sex chromosome, and the rest of the chromosome were named as autosomes. Grasshopper and cockroach is an example of XO type of sex determination in which the males have only one chromosome besides the autosomes, whereas females have a pair of X-chromosomes.

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In XO type of sex determinationA. Females produce two types of gametesB. Males produce two types of gametesC. Females produce gametes with Y-chromosomeD. Males produce gametes with Y-chromosome

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