What is the difference between meiosis 1 and meiosis 2?
What is the difference between meiosis 1 and meiosis 2?
Meiosis:
- Meiosis is a form of cell division that describes germ cell division, which comprises two nucleus fission.
- The two nuclear fissions, meiosis 1 and meiosis 2 produce four cells known as gametes.
- Each gamete has half as many chromosomes as the parent cell.
- This form of cell division happens during reproduction when one cell divides into four haploid daughter cells.
Meiosis I: Meiosis I separates a pair of homologous chromosomes and reduces diploid cells to haploids.
Meiosis II: During meiosis II, sister chromatids found in two daughter cells separate and form four new haploid gametes.
Difference between meiosis 1 and meiosis 2:
Meiosis I Meiosis II Definition: Meiosis 1 divides the homologous chromosomes and turns the
diploid cell into a haploid.
Definition: The sister chromatids within the two daughter cells split
during meiosis II, resulting in the formation of four haploid gametes.
Division: Meiosis I is reductive division. Division: Meiosis II involves equational division. Crossing over: Crossing takes place in meiosis I. Crossing over: Crossing over is absent in meiosis II. Chromosome number: Meiosis I reduces the chromosome number in the
daughter cell.
Chromosome number: During meiosis II the parent and daughter
cells have equal number of chromosomes.
Chromosomes present at the beginning: Homologous chromosome are present at the beginning. Chromosomes present at the beginning: Individual, bivalent chromosomes are present at the beginning. Phases: Meiosis I has four phases:
a. Prophase I
b. Metaphase I
c. Anaphase I
d. Telophase I
Phases: Meiosis II has phases:
a. Prophase II
b. Metaphase II
c. Anaphase II
d. Telophase II
Chromosomes in daughter nuclei: Daughter nuclei have individual chromosomes. Chromosomes in daughter nuclei: Sister chromosomes are present in daughter nuclei. Time: The complex division in meiosis I take more time. Time: Complex division in meiosis II is less time-consuming and simpler.
Meiosis:
- Meiosis is a form of cell division that describes germ cell division, which comprises two nucleus fission.
- The two nuclear fissions, meiosis 1 and meiosis 2 produce four cells known as gametes.
- Each gamete has half as many chromosomes as the parent cell.
- This form of cell division happens during reproduction when one cell divides into four haploid daughter cells.
Meiosis I: Meiosis I separates a pair of homologous chromosomes and reduces diploid cells to haploids.
Meiosis II: During meiosis II, sister chromatids found in two daughter cells separate and form four new haploid gametes.
Difference between meiosis 1 and meiosis 2:
| Meiosis I | Meiosis II |
Definition: Meiosis 1 divides the homologous chromosomes and turns the diploid cell into a haploid. | Definition: The sister chromatids within the two daughter cells split during meiosis II, resulting in the formation of four haploid gametes. |
| Division: Meiosis I is reductive division. | Division: Meiosis II involves equational division. |
| Crossing over: Crossing takes place in meiosis I. | Crossing over: Crossing over is absent in meiosis II. |
Chromosome number: Meiosis I reduces the chromosome number in the daughter cell. | Chromosome number: During meiosis II the parent and daughter cells have equal number of chromosomes. |
| Chromosomes present at the beginning: Homologous chromosome are present at the beginning. | Chromosomes present at the beginning: Individual, bivalent chromosomes are present at the beginning. |
Phases: Meiosis I has four phases: a. Prophase I b. Metaphase I c. Anaphase I d. Telophase I | Phases: Meiosis II has phases: a. Prophase II b. Metaphase II c. Anaphase II d. Telophase II |
| Chromosomes in daughter nuclei: Daughter nuclei have individual chromosomes. | Chromosomes in daughter nuclei: Sister chromosomes are present in daughter nuclei. |
| Time: The complex division in meiosis I take more time. | Time: Complex division in meiosis II is less time-consuming and simpler. |
