Unit 2: Cell Replication + Meiosis Flashcards

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0
Q

What happens in G1?

A

Cell grows

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1
Q

What is meiosis?

A

Cell division of the gametes

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2
Q

What happens in S?

A

DNA replication

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3
Q

What happens in G2?

A

Cell prepares for mitosis

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4
Q

During what phase does cell division occur?

A

Cytokinesis

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5
Q

During what phase do G1, S and G2 occur?

A

Interphase

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6
Q

What is DNA helicase?

A

An enzyme which breaks down bonds between bases

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7
Q

What type of replication occurs when DNA strands split and form a template for a new DNA strand?

A

Semi-conservative replication

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8
Q

Where do free bases come from?

A

The food we eat

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9
Q

Which enzyme links the nucleotides?

A

DNA polymerase

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10
Q

What happens during interphase?

A

No cell division

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11
Q

What happens during prophase

A

The chromosomes condense, the nuclear envelope disappears and the spindles begin to form

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12
Q

What happens during metaphase?

A

The chromatids attach to the spindle fibres and they line up along the equator

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13
Q

What happens during anaphase?

A

Spindle fibres contract and centromere splits, one pulled to each pole

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14
Q

What happens during telophase?

A

The cytoplasm divides and the nuclear envelope reappears, the spindles disintegrate and the chromosome begins to uncoil

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15
Q

What’s an allele?

A

One form of different genes