week 5 meiosis, mitosis and the cell cycle Flashcards

1
Q

Diploid

A

2 sets (46)

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2
Q

Haploid

A

1 set (23)

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3
Q

Mitosis

A

IPMAT

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4
Q

Interphase

A

G1 - Growth and metabolic
S - Replication of DNA
G2 - Growth and more preparation

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5
Q

Prophase

A

Chromosomes condense and become visible

nuclear envelope breaks down

centrioles move to opposite sides of the cell

Spindle begins to form

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6
Q

Prometaphase

A

Chromosomes attach to the spindle at centromeres

Kinetochore connect chromosomes to microtubules

centrosomes form poles

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7
Q

Metaphase

A

Chromosome tightly coiled

chromatids line up on metaphase plate

each chromatid attaches to spindle fibre

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8
Q

Anaphase

A

Centromeres split in two

chromatids pulled

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9
Q

Telophase

A

chromosomes diffuse at poles

Nuclear envelope begins to reform

spindle breaks down

cytoplasm begins to divide

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10
Q

Cytokinesis

A

cytoplasm actually divides

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11
Q

Metaphase checkpoint

A

equal chromosome spindle attachment

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12
Q

G1 checkpoint

A

Cell size, nutrients, growth factors, DNA damage

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13
Q

G2 checkpoint

A

Cell size, DNA replication, DNA damage

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14
Q

Cyclin Protein

A

Activates cyclin-dependent kinases (cdks)

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15
Q

Cyclin-dependent kinases (cdks)

A

most are inactive, active with cyclins. Make a target protein more or less active.

eg, nuclear membrane breakdown or DNA replication promotion

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16
Q

Autosomes

A

non sex chromosomes (22)(44)

17
Q

Sex Chromosomes

A

X or Y (1)(2)

18
Q

Karyotype

A

Display homologous chromosomes visually (must be in metaphase)

19
Q

Locus

A

Position where the gene is

20
Q

Gene

A

Trait (eye colour)

21
Q

Allele

A

form of trait (blue/brown)

22
Q

Meiosis 1

A

Separation of homologous pairs 2 haploid cells

23
Q

Meiosis 2

A

Separates sister chromatids
4 haploid cells