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Meiosis
- Definition: A type of cellular reproduction in
which the number of chromosomes are reduced
by half through the separation of homologous
chromosomes, producing two haploid cells.
- Function: Genetic diversity through sexual reproduction.
- Type of Reproduction: Sexual
- Occurs in: Humans, animals, plants, fungi.
- Genetically: Different
- Crossing Over: Yes, mixing of chromosomes can occur
- Pairing of homologs: Yes
- Number of Divisions: 2
- Number of Daughter Cells produced: 4 Haploid cells
- Chromosome number: Reduced by half
- Steps: (Meiosis 1) Prophase I, Metaphase
I, Anaphase I, Telophase I; (Meiosis 2)
Prophase II, Metaphase II, Anaphase II
and Telophase II.
- Karyokinesis : Occurs in Interphase I.
- Cytokinesis: Occurs in Telophase I and in Telophase II.
- Centromeres Split: The centromeres do not separate
during anaphase I, but during anaphase II
- Creates: Sex cells only: female egg cells or male
sperm cells.
- Discovered by : Oscar Hertwing
- Discovered by : Oscar Hertwing
- Creates: Sex cells only: female egg cells or male
sperm cells.
- Centromeres Split: The centromeres do not separate
during anaphase I, but during anaphase II
- Cytokinesis: Occurs in Telophase I and in Telophase II.
- Karyokinesis : Occurs in Interphase I.
- Steps: (Meiosis 1) Prophase I, Metaphase
I, Anaphase I, Telophase I; (Meiosis 2)
Prophase II, Metaphase II, Anaphase II
and Telophase II.
- Chromosome number: Reduced by half
- Number of Daughter Cells produced: 4 Haploid cells
- Number of Divisions: 2
- Pairing of homologs: Yes
- Crossing Over: Yes, mixing of chromosomes can occur
- Genetically: Different
- Occurs in: Humans, animals, plants, fungi.
- Type of Reproduction: Sexual
- Function: Genetic diversity through sexual reproduction.
- Comparing meiosis and mitosis.
- Mitosis
- Definition:A process of asexual reproduction in
which the cell divides in two producing a replica,
with an equal number of chromosomes in each
resulting diploid cell.
- Function: Cellular reproduction and general growth and
repair of the body.
- Type of Reproduction : Asexual
- Occurs in: All organisms
- Genetically: identical
- Crossing over, no, crossing over cannot occur.
- Chromosome number remains the same
- Karyokinesis: Occurs in Interphase
- Cytokinesis: Occurs in Telophase
- Centromeres Split: The centromeres split during anaphase
- Creates: Makes everything other than sex cells.
- Discovered by: Walther Flemming
- Discovered by: Walther Flemming
- Creates: Makes everything other than sex cells.
- Centromeres Split: The centromeres split during anaphase
- Cytokinesis: Occurs in Telophase
- Karyokinesis: Occurs in Interphase
- Chromosome number remains the same
- Crossing over, no, crossing over cannot occur.
- Genetically: identical
- Occurs in: All organisms
- Type of Reproduction : Asexual
- Function: Cellular reproduction and general growth and
repair of the body.
- Definition:A process of asexual reproduction in
which the cell divides in two producing a replica,
with an equal number of chromosomes in each
resulting diploid cell.
- Mitosis
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