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Genetics > Chapter 3 Mitosis and Meiosis > Flashcards

Chapter 3 Mitosis and Meiosis Flashcards

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Biology 101 flashcards
1
Q

of chromosomes is equal to the number of ?

A

intact centromeres

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2
Q

What are the three stages of interphase?

A

G1
S
G2

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3
Q

When is DNA replicated?

A

S phase of interphase

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4
Q

Define mitosis

A

single cell division

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5
Q

What are the four stages of mitosis?

A

prophase
metaphase
anaphase
telophase

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6
Q

What happens during prophase?

A

2n, 2c
spindle apparatus forms

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7
Q

What happens during metaphase of mitosis?

A

2n, 2c
chromosomes align at equatorial plate

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8
Q

What happens during anaphase?

A

paired sister chromatids separate to opposite sides of pole
each chromosome contains one chromatid

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9
Q

What happens during telophase?

A

2n, 1c
cells reform into two

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10
Q

Define meiosis.

A

generates haploid gametes

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11
Q

Meiosis I is a ___ division; meaning chromosome number is __

A

reductional; halved

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12
Q

What happens during prophase I?

A

2n 2c
4 chromatids (tetrads) pair up side by side

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13
Q

What happens during metaphase I?

A

2n, 2c
chromosomes align at center of plate

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14
Q

What happens during anaphase I?

A

one set of chromosomes move to each pole; homologs separate

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15
Q

What happens during telophase I?

A

2n, 1c

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16
Q

What is interkinesis?

A

A short intermission between meiosis I and II

17
Q

Meiosis II is a __ division, and the number of chromosomes ___

A

equatorial; do not change

18
Q

What happens during prophase II?

A

line up next to each other; 1n, 2c

19
Q

What happens during metaphase II?

A

middle of cell; 1n, 2c

20
Q

What happens during anaphase II?

A

paired sister chromatids separate; 1 chromosome to 1 chromatid

21
Q

What happens during telophase II?

A

haploid set of chromosomes at each pole;
1n, 1c

22
Q

What are the five stages of prophase I?

A

leptonema
zygonema
pachynema
diplonema
diakinesis

23
Q

Walk through the process of spermatogensis

A

primary spermatocyte (MI) 2 haploid secondary spermatocytes (MII) four haploid spermatocytes > spermatids > sperm cells

24
Q

Walk through the process of oogenesis?

A

primary oocyte (MI) secondary oocyte + 1st polar body (MII) secondary oocyte + multiple polar bodies > egg cell

25
Q

Spermatogenesis partakes in ___ divisions while oogenesis undergoes __ divisions

A

symmetric; asymmetric

Genetics (9 decks)

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