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Biology > The Cell Cycle > Flashcards

The Cell Cycle Flashcards

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1
Q

The cell cycle describes

A

The life cycle of a cell obviously

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2
Q

What is the cell cycle meant?

A

The cell cycle is the changes that occur in

a cell during the period between one cell

division and the next.

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3
Q

Cell cycle is divided into two parts :

A

INTERPHASE

CELL DIVISION

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4
Q

Interphase is

A

When cell is not dividing.

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5
Q

Cell Division

A

Mitosis or meiosis.

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6
Q

INTERPHASE

The longest phase in the cell cycle.

is an active phase because

A

New organelles are formed

Single stranded chromosomes from double stranded copies of themselves.

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7
Q

MITOSIS means: ONE

A

A nucleus divides into TWO in order to from TWO nuclei.

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8
Q

MITOSIS means: TWO

A

Each nuclei becomes enclosed in a cell.

( daughter cell )

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9
Q

MITOSIS means: THREE

A

The chromosome number in each stays the same as the parent nucleus.

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10
Q

MITOSIS means : FOUR

A

The genes are identical to each daughter cell and parent cell.

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11
Q

Mitosis is known as SOMATIC CELLS because :

A

Mitosis takes place in cells that are not associated with reproductive system.

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12
Q

Please explain what Mitosis is :

A

Mitosis is a form of cell division.

It is how ONE parent nucleus will give

RISE to TWO daughter that share the

same DNA making them identical.

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13
Q

MITOSIS PROCESS

STAGE ONE

A

Double stranded chromosomes start to become visible in the nucleus.

Fibres appear.

The nuclear membrane starts to break down.

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14
Q

MITOSIS PROCESS

STAGE TWO

A

The nuclear membrane breaks down now.

Chromosomes line up in the middle.

The fibres begin to ATTACH to each chromosome.

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15
Q

MITOSIS PROCESS

STAGE THREE

A

the fibres contract

two fibres then attach

one strand from each double stranded chromosome is pulled.

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16
Q

MITOSIS PROCESS

STAGE FOUR

A

chromsomes elongate within each nucleus and becomes chromatin.

a nuclear membrane forms around.

17
Q

The functions of Mitosis

Unicellular organisms

A

It allows single celled organisms to

reproduce asexually like plants and

bacteria.

18
Q

The functions of Mitosis

Multi Cellular Organisms

A

It allows growth and repair of cells.

Formation of new cells to replace old and damaged cells.

19
Q

The functions of Miosis :

A

To halve the number of chromosomes so that the normal number can be restored

Produce chromosomes with genetic variations

20
Q

MEIOSIS is a

A

Form of nuclear division in which four

daughter nuclei contain half the

chromosome number of the parent

nucleus.

21
Q

Immediately after MEIOSIS

A

The daughter nueclei are enclosed by cells.

22
Q

When meiosis takes place in a diploid cell

All daughter cells will be

A

All daughter cells will be haploid.

23
Q

Haploid cells are able to

A

Fuse with another gamete of opposite sex.

24
Q

Where does Meiosis occur and what do they produce?

A

In the ovaries and testes

They produce gametes called eggs and sperm.

25
Q

What number of chromosomes does Meiosis half?

Meosis halves the number of
chromosomes in each resulting

A

23 in egg 23 in sperm.

26
Q

Gametes are H

A

Haploid cells.

27
Q

Four Stages of Mitosis

Party Monday And Tuesday

A

Prophase

Metaphase

Anaphase

Telophase

28
Q

THE DIFFERENCES
BETWEEN MITOSIS AND MEIOSIS

in daughter cells.

A

Mitosis daughter cells have the SAME number of chromosomes as the parent.

Meiosis daughter cells have HALF the number of chromosomes of the parent.

29
Q

THE DIFFERENCES
BETWEEN MITOSIS AND MEIOSIS

daughter cells in genes

A

Mitosis daughter cells have IDENTICAL GENES on their chromosomes.

Meiosis daughter cells have DIFFERENT GENES on their chromosome.

30
Q

THE DIFFERENCES
BETWEEN MITOSIS AND MEIOSIS

in cells formed

A

Two cells formed - Mitosis

Four cells formed - Meiosis

Biology (8 decks)

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