Meiosis: Introduction

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An introductory diagram of mitosis, when a cell undergoes two distinct divisions to become four new “daughter” cells. The new cells contain only 23 chromosomes and are therefore said to be “haploid”, having only one copy of each chromosome, rather than a full pair. This ensures that when an egg and a sperm join during fertilization, the resulting cell will have 46 chromosomes—hence, why meiosis is the exclusive form of cell division for gametes.