Chapter 10 test Flashcards

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1
Q

chromatid

A

each side of a chromosome (worm)

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2
Q

chromatin

A

material of chromosomes

DNA wrapped around proteins

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3
Q

centromere

A

belt of chromosome

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4
Q

centrioles

A

controls the spindles

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5
Q

spindle fibers

A

pull apart chromatids

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6
Q

reasons for cell division

A

to create more efficient smaller cells

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7
Q

as cell size increases?

A

less efficient

volume grows faster than surface area

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8
Q

interphase

A

90% of a cells life

not part of mitosis

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9
Q

G1

A

cell growing

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10
Q

S

A

DNA replication

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11
Q

G2

A

preparing for mitosis

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12
Q

prophase

A

nuclear membrane disintegrates
chromosomes condense
spindle forms

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13
Q

metaphase

A

chromosomes line up across the cell

centromeres connect with spindles

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14
Q

anaphase

A

chromosomes separate

chromosomes move to opposite side of the cell

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15
Q

telophase

A

chromosomes spread onto chromatin
nuclei form around each cluster
spindle breaks

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16
Q

cytokinesis

A

cells divide

17
Q

how do animal cells divide

A

a cleavage furrow forms and the cells separate

18
Q

how do plant cells divide

A

a cell plate is built that turns into a cell wall

they don’t separate

19
Q

somatic cells

A

all cells except the sex cells

20
Q

how many somatic cells do humans have

A

46

21
Q

cancer

A

out of control cell growth
creates tumors
only affects multicellular organisms

22
Q

main stages of cell division

A

cytokinesis and mitosis