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Презентация на тему Mitosis and the Cell Cycle. Cell reproduction

Some DefinitionsSomatic Cells – body cellsProduced through mitosisHas 46 chromosomes (23 pairs)Homolog – each member of a chromosome pairDiploid (2n) – total of 46 chromosomes in people – zygote & somatic cellsHaploid (n) – total of
Mitosis and the Cell CycleCell reproduction Some DefinitionsSomatic Cells – body cellsProduced through mitosisHas 46 chromosomes (23 pairs)Homolog The Cell CycleThe sequence of growth and division of a cell.95% of Cell cycle InterphaseGrowth Stage 1 (G1) – metabolic activity of the cellSynthesis Stage (S) MitosisHappens in all cellsCell division process5 major stages ProphaseNuclear envelope disappearsChromosomes condense – can see sister chromatids  and centromereSpindle forms MetaphaseChromosomes move to the equator of spindleEach chromatid is attached to spindle with centromere AnaphaseCentromeres splitSister chromatids are pulled apart to opposite poles of the cellEach TelophaseNuclear envelopes (2) reformChromosomes begin to uncoil CytokinesisCytoplasm dividesTwo new daughter cells are now separate
Слайды презентации

Слайд 2 Some Definitions
Somatic Cells – body cells
Produced through mitosis
Has

Some DefinitionsSomatic Cells – body cellsProduced through mitosisHas 46 chromosomes (23

46 chromosomes (23 pairs)
Homolog – each member of a

chromosome pair
Diploid (2n) – total of 46 chromosomes in people – zygote & somatic cells
Haploid (n) – total of 23 chromosomes in people, gametes (sperm & egg)

Слайд 3 The Cell Cycle
The sequence of growth and division

The Cell CycleThe sequence of growth and division of a cell.95%

of a cell.
95% of cell cycle in interphase
5% of

cell cycle in mitosis

Слайд 4 Cell cycle

Cell cycle

Слайд 5 Interphase
Growth Stage 1 (G1) – metabolic activity of

InterphaseGrowth Stage 1 (G1) – metabolic activity of the cellSynthesis Stage

the cell
Synthesis Stage (S) – metabolic activity of the

cell, replication of DNA
Growth Stage 2 (G2) – metabolic activity of the cell, prepare for division

Слайд 6 Mitosis
Happens in all cells
Cell division process
5 major stages

MitosisHappens in all cellsCell division process5 major stages

Слайд 9 Prophase
Nuclear envelope disappears
Chromosomes condense – can see sister

ProphaseNuclear envelope disappearsChromosomes condense – can see sister chromatids and centromereSpindle forms

chromatids

and centromere
Spindle forms


Слайд 10 Metaphase
Chromosomes move to the equator of spindle
Each chromatid

MetaphaseChromosomes move to the equator of spindleEach chromatid is attached to spindle with centromere

is attached to spindle with centromere


Слайд 11 Anaphase
Centromeres split
Sister chromatids are pulled apart to opposite

AnaphaseCentromeres splitSister chromatids are pulled apart to opposite poles of the

poles of the cell
Each chromatid is now a separate

chromosome

Слайд 12 Telophase
Nuclear envelopes (2) reform
Chromosomes begin to uncoil

TelophaseNuclear envelopes (2) reformChromosomes begin to uncoil

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