Chapter 16 Meiosis (part1)
16.1 - Meiosis
1. What 'meiosis' is
2. The stages of meiosis
3. The differences between meiosis and mitosis
Overview of meiosis
Meiosis is a type of cell division in which a parent cell divides to form four haploid cells,
each genetically distinct from one another.
Before meiosis starts, DNA is replicated during interphase so that each chromosome
contains two chromatids.
, The cell then undergoes 2 divisions:
1. Meiosis I - Homologous chromosomes are separated.
2. Meiosis II - Chromatids are separated.
Meiosis involves a reduction division in which the chromosome number is halved to
form haploid cells. These haploid cells form the gametes (egg and sperm cells) in
animals and plants.
Stages of meiosis
The two divisions of meiosis contain the same stages as mitosis:
1. Meiosis I - Prophase I, metaphase I, anaphase I, and telophase I.
2. Meiosis II - Prophase II, metaphase II, anaphase II, and telophase II.
Remember that cells have already replicated their DNA during interphase and each
chromosome is made up of two identical sister chromatids.
16.1 - Meiosis
1. What 'meiosis' is
2. The stages of meiosis
3. The differences between meiosis and mitosis
Overview of meiosis
Meiosis is a type of cell division in which a parent cell divides to form four haploid cells,
each genetically distinct from one another.
Before meiosis starts, DNA is replicated during interphase so that each chromosome
contains two chromatids.
, The cell then undergoes 2 divisions:
1. Meiosis I - Homologous chromosomes are separated.
2. Meiosis II - Chromatids are separated.
Meiosis involves a reduction division in which the chromosome number is halved to
form haploid cells. These haploid cells form the gametes (egg and sperm cells) in
animals and plants.
Stages of meiosis
The two divisions of meiosis contain the same stages as mitosis:
1. Meiosis I - Prophase I, metaphase I, anaphase I, and telophase I.
2. Meiosis II - Prophase II, metaphase II, anaphase II, and telophase II.
Remember that cells have already replicated their DNA during interphase and each
chromosome is made up of two identical sister chromatids.
