Mieosis and Mitosis

Both mitosis and meiosis inolve in

making new cells

What you start with for mitosis and meiosis

a diploid cell (2n - two set a chromosones, one)

What happens during interphase?

Chromosomes are duplicated

What is the result of chromosome duplication in interphase?

The total number of chromosomes remains the same

What happens to the chromosomes at the centromere during interphase?

They remain attached

Mitosis goes through PMAT

Once

Meiosis goes through PMAT

Twice

Prophase in MITOSIS

chromosomes condense and spindle apparatus begins to form

What happens during prophase 1 of meiosis?

Chromosomes become visible and homologous pairs match up. Crossing over occurs, leading to the formation of recombinant chromosomes.

What is the significance of crossing over in meiosis?

Crossing over during prophase 1 of meiosis leads to the exchange of genetic material between homologous chromosomes, resulting in genetic variation.

Metaphase (m for middle) for MITOSIS

Chromosomes line up in the middle of the cell

Metaphase 1 for MEIOSIS

Chromosones are going to line up as pairs in the middle of the line,

Anaphase (a for away) for MITOSIS

The CHROMOTIDS are pulled away by spindles to opposite sides of cell

Anaphase 1 for MEIOSIS

CHROMOSONES, (not chromatids) being pulled away to opposite sides of cell

Telephase for Mitosis and Meiosis

Chromosomes are on opposite sides and new nuclei are formed

Cytokenisis for Mitosis and Meiosis

Splits cytoplasm to make two seperate cells

RESULT OF MITOSIS AFTER CYTO

Two identical diploid cells (in humans they would have 46 chromosones)

Prophase 2 for MEIOSIS

Chromosomes are condesing in both cells, there is NO crossing over in PROPHASE 2

Metaphase 2 for MEIOSIS

Chromosomes line up in single file line

Anaphase 2 MEIOSIS

CHROMOTIDS are being pulled to opposite sides

Telophase 2 MEIOSIS

Chromosomes are at opposite ends of cell, and nuclei are being formed around them

Cytokenisis 2 for MEIOSIS

Cytoplasm is split to divide cells

RESULT FROM MEIOSIS 2

4 GAMETE HAPLOID NON IDENTICAL CELLS, because they have half the number of chromosomes of og cell

Human body cells have

46 chromosomes

Human sex cells have

23 chromosomes

Sister chromatids are held at

one centromere

Daughter cells are

identical to starting cells in the beginning of MITOSIS

In meiosis the 4 daughter cell will have

half amount of chromosomes as og cell

In mitosis the 2 resulting cells will have

the same amount of chromosomes as starting cell