Question

Formation of $50$ zygotes of tobacco require minimum $..........$ meiosis.

• A. $57$
• B. $63$
• C. $109$
• D. $99$

Answer 1

The correct option is B $63$

To form a zygote fusion of male and female gametes are needed. From one meiotic division four gametes are formed in case of male gametes while 1 female gamete i.e., the egg cell is formed after one meiotic division. To form, 50 zygotes, 50 male gametes and 50 female gametes are necessary. 50 male gametes will be formed after meiotic division of 13 cells ( actually giving 52 pollens) and 50 female gametes will be formed after 50 meiotic divisions. So, total 63 meiotic divisions are needed to form 50 zygotes.