Mitosis Flashcards

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1
Q

How many copies of each chromosome does a body cell normally have?

A

Two one from the mother and one from the father

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2
Q

How many pairs of chromosomes are found in a human cell?

A

23

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3
Q

What does a body cell need to do when it divides?

A

Make new cells identical to the original cell with the same number of chromosomes

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4
Q

What is mitosis?

A

When a cell reproduces itself by splitting to form two identical Offspring

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5
Q

When is mitosis used?

A

When plants and animals want to grow or replace cells that have been damaged

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6
Q

What is the DNA like in a cell that is not dividing?

A

Spread out in a long string

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7
Q

What happens when a cell gets the signal to divide?

A

It needs to duplicate its DNA so there’s one copy for each new cell

The DNA is copied and forms x shaped chromosomes

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8
Q

What is each ‘arm’ of the chromosome?

A

An exact duplicate of the other (have the same DNA)

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9
Q

After duplication what do the chromosomes do?

A

They line up at the centre of the cell and fell fibres pull them apart, the two arms of each chromosomes go to opposite sides of the cell

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10
Q

What then forms around each of the chromosome sets?

A

Membranes

This becomes te nuclei of the two new cells

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11
Q

What is the final step of mitosis?

A

The cytoplasm divides

You now have two new cells with identical DNA

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12
Q

What type of reproduction uses mitosis?

A

Asexual

The offspring have exactly the same genes as the parent and there’s no variation

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