Which of the following organism does not show 'XO' condition chromoso…

The correct answer is Option (3) → Drosophila

Option (1) Majority of insects — Shows XO. Many insects have XO males.

Option (2) Grasshopper — Shows XO.

Option (3) Drosophila — Does not show XO. Drosophila males are XY.

Option (4) Turner's syndrome — Shows XO. Turner’s syndrome is 45, X0.

NCERT Extract:
Sex Determination – “… Due to the involvement of the X-chromosome in the determination of sex, it was designated to be the sex chromosome, and the rest of the chromosomes were named as autosomes.Grasshopper is an example of XO type of sex determination in which the males have only one X-chromosome besides the autosomes, whereas females have a pair of X-chromosomes.”
Sex Determination – “… In human beings and in Drosophila the males have one X and one Y chromosome, whereas females have a pair of X-chromosomes besides autosomes (Figure 4.12 a, b).”
Chromosomal Disorders – “… Turner’s Syndrome : Such a disorder is caused due to the absence of one of the X chromosomes, i.e., 45 with X0, Such females are sterile as ovaries are rudimentary besides other features including lack of other secondary sexual characters (Figure 4.17 b).”