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Biology- Cell Division > Cell Division > Flashcards

Cell Division Flashcards

1
Q

Cell continuity

A

All cells develop from pre existing cells

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2
Q

Chromosomes in the form of long,thin threads

A

Chromatin

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3
Q

Number of chromosomes in each body cell of a human.

A

46

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4
Q

Chromosomes: definition

A

Thread like structures that contain DNA and protein found in the nucleus of the cell.

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5
Q

Gene : definition

A

A section of DNA that are our units of inheritance

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6
Q

Haploid cell : definition

A

Cell which contains only one of each type of chromosome

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7
Q

Haploid cell : n = ?

A

23

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8
Q

Diploid cell : definition

A

A cell which contains 2 sets of chromosomes.

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9
Q

Diploid cell : 2n=?

A

46

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10
Q

Homologous pair (diploid cell)

A

One set of chromosomes comes from the father, the other from the mother

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11
Q

The cell cycle

A

Describes the life cycle of the cell

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12
Q

Interphase

A

The phase in the cell cycle when the cell is not dividing.

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13
Q

How much of the cell cycle does interphase account for ?

A

90%

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14
Q

How do chromosomes appear during interphase ?

A

Chromatin

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15
Q

What does the cell do during interphase?

A

Very active. Produces new organelles. Forms chemicals needed for growth (proteins and enzymes)

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16
Q

Mitosis: definition

A

A form of nuclear division in which one nucleus divides to form 2 identical nuclei.

17
Q

Type of cell formed by mitosis

A

Daughter cells

18
Q

Stage 1?

A

Prophase
•nucleor membrane begins to breakdown
•spindle fibres form
•chromatin become chromosomes

19
Q

Stage 2?

A

Metaphase:
•chromosomes line up at equator
•spindle fibres connect to centromere

20
Q

Stage 3?

A

Anaphase:
•spindle fibres contract
•1 chromosome from each pair pulled to each end of cell (identical)

21
Q

Stage 4?

A

Telophase:
•nucleor membrane re-forms
•chromosomes become chromatin and 2 identical nuclei form

Biology- Cell Division (1 decks)

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