Ch. 12 Flashcards

1
Q

Holds that sexual reproduction is widespread because o the pressure for constant change resulting from species interactions

A

Red queen hypo

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2
Q

Alleles are forms of a gene with __

A

slightly different DNA sequences

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3
Q

When does independent assortment occur?

A

Anaphase I

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4
Q

What is visible in prophase?

A

Tetrads

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5
Q

Process of tetrad formation?

A

Syanpsis

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6
Q

Chromoem segregation segregates __

A

homologous chromos

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7
Q

Immature reproductive cell

A

Germ cell

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8
Q

Where do germ cells form

A

reproductive organs

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9
Q

Animals?

A

Meiosis in diploid germ cells makes gametes

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10
Q

IN plants, germ cells are

A

haploid and form by meiosis

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11
Q

Which? Condenses into a chromo immediately beforehand

A

Mitosis

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12
Q

When does synapsis occur?

A

Prophase I

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13
Q

When does crossing over occur?

A

Prophase I

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14
Q

Are both followed by

A

cytokinesis

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15
Q

A tetrad is made of

A

4 chromosomes

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16
Q

What comes first: Synapsius or crossing over

A

synapsis

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17
Q

Homologous chromosomes pair

A

synapsis

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18
Q

___ line up in double file

A

tetrads

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19
Q

Is Meiosis II preceded by interphase

A

no

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20
Q

Mitosis: The chromosomes have moved to opposite poles during

21
Q

Mitosis: When are wchrommos attached to sister chromatids?

A

Prophase and metaphase

22
Q

Bit: After mitosis and cytokinesis, etchn new cell has a complete set of

A

46 chromosomes

23
Q

Bit: When are chromo visilbe?

A

Only during cell division

24
Q

Mit: 3 major

A

metasais, abnormal chromo number and cytoskeleton, destroy other tissues

25
Do spindle fibers and centrioles form in P?
No just spindles
26
cell goes back to normal in
telophase
27
Binary fission type of reproductino
asexual
28
Asexual uni/muli
mitosis or budding | budding
29
Con A
mutation affects all
30
Pro S
mutations passed down
31
Beta globing makes UP __ has __
hemoglobin | 700 alleles
32
dominat and
recessive
33
Plant's soerm is
polen
34
Holds eggs in plants
carpel
35
in plants, sperm forms by
mitosis
36
Reduction division aka
meiosis
37
X is
copied chromo
38
l is
uncopied chromo
39
__ precedes meiosis
interphase
40
zygote undergoes RMT to form
embryo (down Fallopian tubes )
41
Sperm live up to
3 days
42
how can distinguish between meiosis Ii and mitosis
Meiosis has 2 cells
43
ho many corsia cover
46-95
44
Humans have __ combos
2^23
45
where do spindles bind to
kintecore (region of centromere)
46
Oogenesis and
spermatogenesis
47
__ mature into sperm
spermatids
48
Oogensis takes place I
ovaries
49
Synapsis or crossing over first?
Synapsis