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Which one of the following conditions correctly describes the manner of determining the sex in the given example?

1. Homozygous sex chromosomes (ZZ) determine female sex in birds.
2. XO type of sex chromosomes determine male sex in grasshopper
3. XO condition in human as found in Turner syndrome, determines female sex.
4. Homozygous sex chromosomes (XX) produce male in Drosophila.

Correct answer: XO type of sex chromosomes determine male sex in grasshopper

Solution

In grasshoppers, the XO system is used: males are XO and females are XX. Therefore, the XO condition determines male sex in grasshopper, making option B correct.

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