Question

question:
which of the following happens during mitosis but not during meiosis?

answer options:
select one of four
production of two daughter cells
occurrence of crossing over
reduction in chromosome number
involvement of gametes

Explanation:

1. Analyze "Production of two daughter cells": Mitosis results in two daughter cells. Meiosis results in four daughter cells (after meiosis II, starting from one cell, meiosis I gives two, meiosis II gives four). So mitosis produces two, meiosis doesn't (it produces four).
2. Analyze "Occurrence of crossing over": Crossing over happens in meiosis (prophase I) to increase genetic variation, not in mitosis.
3. Analyze "Reduction in chromosome number": Meiosis reduces chromosome number (from diploid to haploid), mitosis keeps it the same (daughter cells are diploid like parent).
4. Analyze "Involvement of gametes": Gametes are involved in meiosis (produced by meiosis), mitosis is for growth, repair, etc., not directly for gamete production.

So the event that happens in mitosis but not meiosis is production of two daughter cells.

Answer:

Production of two daughter cells