What will be the number of chromosomes in the gamete of maize if its meiocyte contains 20 chromosomes ?

10

The correct answer is Option (1) - 10

In diploid organisms, specialised cells called meiocytes (gamete mother cell) undergo meiosis. At the end of meiosis, only one set of chromosomes gets incorporated into each gamete.

So, if the meiocyte (a cell undergoing meiosis) of maize contains 20 chromosomes, the number of chromosomes in the gamete would be half of that, which is 10 chromosomes.