B2- Cell Division Flashcards

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1
Q

What are a pair of chromosomes called

A

Homologises pairs. One from each parent

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2
Q

How many paris pf chromosomes are there in the nucleus

A

23

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3
Q

What is a gene

A

A gene is a section of a chromosome

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4
Q

What is DNA

A

Deoxyribonucleic acid.
Double helix structure (twisted ladders)
This is the genetic code for every living thing
The rung of each ladder is called a base

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5
Q

What is mitosis important for

A

Divides to form an identical cell

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6
Q

What is differentiation

A

As cells take on specific jobs they become ‘specialised’. The process by which this happens is called differentiation.

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7
Q

What is a zygote

A

The single cell that is created when a sperm and egg fuse.

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8
Q

What is an embryo

A

The ball of cells created from the zygote dividing

The embryo contains undifferentiated cells that have not been specialised yet

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9
Q

What is a blastcypocyst

A

The blastocyst is a structure formed in the early development of mammals. It possesses an inner cell mass (ICM) which subsequently forms the embryo.

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10
Q

What is a stem cell

A

A undifferentiated cell

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11
Q

Where can stem cells be found in a human and plant

A

Liver and meristems

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