Differences Mitosis Meiosis YouTube Lecture Handouts

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Mitosis Versus Meiosis

Dr. Manishika Jain in this session explains 33 differences between mitosis and meiosis and the differences in various stages of mitosis and meiosis.Differences are studied under the following stages:ProphasePrometaphaseMetaphaseAnaphaseTelophaseFollowed by cytokinesis.

Mitosis

INTERPHASE

• The cell is preparing for division.

• Organelles replicate.

• DNA is duplicated

• Cell increases in size.

• Majority of the cell's lifespan is spent in interphase.

PROPHASE

• Chromosomes condense

• Mitotic spindle is formed from microtubules that gradually lengthen driving the division of the cell.

METAPHASE

• Nuclear envelope breaks down

• Condensed chromosomes come into direct contact with the microtubules

• Condensed chromosomes line up along the equator

ANAPHASE

• Sister chromatids are drawn to opposite poles

• Duplicate copies of the cell's DNA are on either side of the cell

• Microtubules get shorter, which begins to allow the cell to separate.

TELOPHASE

• Nuclear envelope reforms as two new nuclear envelopes around the separated sister chromatids.

• Cytokinesis takes place.

• Cytoplasm is equally divided between the two new daughter cells

Meiosis

Prophase I

The chromosomes condense, and the nuclear envelope breaks down. crossing-over occurs.

Metaphase I

Pairs of homologous chromosomes move to the equator of the cell.

Anaphase I

Homologous chrmosomes move to the oppisite poles of the cell.

Telophase I and Cytokinesis

Chromosomes gather at the poles of the cells. the cytoplasm divides.

Prophase II

A new spidle forms around the chromosomes.

Metaphase II

Chromosomes line up at the equator.

Anaphase II

Centromeres divides. chromatids move to the opposite poles of the cells.

Telophase II and Cytokinesis

A nuclear envelope forms around each set of chromosomes. the cytoplasm divides.