Question

In haploid organisms that undergo sexual reproduction, name the stage
in the life cycle when meiosis occurs. Give reasons for your answer.


NCERT Class XII
Biology - Main Course Book

Chapter 1. Reproduction

Answer 1

Zygote is the only diploid stage present in the life cycle of haploid organisms.
Diploid stage to become haploid, meiosis should occur.
So, zygote is that stage when meiosis occurs.

Answer 2

Answer:

The correct answer would be a zygote.

Haploid organisms or organisms which have haplontic life cycle when reproduce by sexual reproduction, they form diploid zygote due to the fusion of two haploid gametes.

The diploid zygote then divides with the help of meiotic division to produce haploid spores or zoospores.

These zoospores then divide through mitotic divisions to grow and mature into a haploid gametophyte.