Pls explain how to solve this question.

Dear student,
Please find below the answer:

The correct option is (1).
The no. of gametes formed in the above case will be 2. If recombination does not occur, we will get one type of gamete with the same composition as given in the question. If recombination occurs, we get a gamete with Yon X chromosome and W+ on Y chromosome.

Hope this information clears your doubt.

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