11 Ap Bio Ch. 9-10

Front 1

mitosis is used by multi-celled organisms for growth by repeated divisions of ______ cells.

Back 1

somatic

Front 2

meiosis occurs in _____ cells to form gametes.

Back 2

germ

Front 3

somatic cells are:

a) diploid
b) haploid

Back 3

diploid

Front 4

egg and sperm are ______ cells.

Back 4

germ

(and also haploid)

Front 5

In which phase of interphase is DNA duplicated?

Back 5

S phase

Front 6

Explain spermatogenesis.

(meiosis and gamete formation in males)

Back 6

germ cell (2n) >>> primary spermatocyte (2n) >>> MEIOSIS I >>> two secondary spermatocytes (n) MEIOSIS II >>> four spermatids (n)

Front 7

Explain oogenesis.

(meiosis and gamete formation in females)`

Back 7

germ cell (2n) >>> primary oocyte (2n) >>> MEIOSIS I >>> secondary oocyte (n) plus polar body (n) >>> MEIOSIS II >>> one largue ovum (n) plus three polar bodies (n, small)

Front 8

Meiosis occurs only in _______ reproduction.

Back 8

sexual

Front 9

During which phase of mitosis does the spindle apparatus begin to become visible?

Back 9

prophase

Front 10

What is the cell plate composed of?

Back 10

microtubule elements and cellulose

Front 11

Under favorable conditions, during which phase of meiosis will the chromosomes appear as packets of four chromatids?

Back 11

prophase I

Front 12

The period that may occur between meiosis I and meiosis II is called:

Back 12

interkinesis

Front 13

Chiasmata are present during which meiotic stage?

Back 13

Prophase I

Front 14

Sperm are formed from the direct maturation of:

Back 14

spermatids

Front 15

gametes are:
a) haploid
b) diploid

Back 15

haploid

Front 16

In plants, which of the following cells is (are) diploid?
a.egg
b.sperm
c.spore
d.leaf cell
e.spore and leaf cell

Back 16

d.leaf cell

Front 17

If a child more strongly resembles one parent's physical traits than the other parent's, the explanation could be due to chromosome movements during:

Back 17

anaphase I

Front 18

Synapsis and crossing over occur during:

Back 18

prophase I

Front 19

Centromeres are separated during:

Back 19

anaphase

Front 20

Telophase is essentially the reverse of the events of:

Back 20

prophase

Front 21

A maternal homologue and a paternal homologue synapse to form:
a. a tetrad
b. sister chromatids
c. a parental pair

Back 21

a. a tetrad

Front 22

Which cycle of meiosis is more like mitosis?

Back 22

meiosis II

Front 23

During the "gap" phases of the cell cycle, most of the activity is directed toward:

Back 23

synthesizing cytoplasmic components

Front 24

The cell cycle of a typical somatic cells consists of ____________ and M phase.
a. interphase
b. meiosis I
c. crossing-over
d. meiosis II
e. mitosis

Back 24

a. interphase

Front 25

Sister chromatids are separated during which phase of meiosis?

Back 25

anaphase II

Front 26

In eukaryotic cells, which can occur during the stages of mitosis?
a. duplication of chromatids
b. replication of DNA
c. synapsis and crossing-over
d. fragmentation and disappearance of nuclear envelope and nucleolus
e. all of these

Back 26

d. fragmentation and disappearance of nuclear envelope and nucleolus

Front 27

Which of the following will NOT develop into a gamete?
a. spermatogonium
b. polar bodies
c. oocyte
d. spermatid
e. secondary spermatocyte

Back 27

b. polar bodies

Front 28

Meiosis typically results in the production of:

Back 28

four haploid cells

Front 29

When chromosomes become visible during prophase of mitosis, it is the result of:

Back 29

condensation

Front 30

Which stages of mitosis consist of 2 DNA molecules?

Back 30

metaphase and prophase

Front 31

A cell in G2:
a. has twice the amount of DNA present in a telophase nucleus.
b. has visibly distinct chromosomes.
c. lacks a visible nuclear membrane.
d. is in mitosis.
e. is in cytokinesis.

Back 31

a. has twice the amount of DNA present in a telophase nucleus.

Front 32

The distribution of cytoplasm to daughter cells is accomplished during:

Back 32

cytokinesis

Front 33

In mitosis, if a parent cell has 16 chromosomes, each daughter cell will have how many chromosomes?

Back 33

16

Front 34

A portion of a DNA molecule wound around a spool of histone protein is called a:

Back 34

nucleosome

Front 35

Four of the five answers listed below are haploid. Select the exception.
a. zygote
b. meiospore
c. egg
d. sperm
e. gametophyte

Back 35

zygote

Front 36

Which of the following does NOT produce variation?
a. crossing over
b. random alignment of chromosomes during meiosis
c. asexual reproduction
d. genetic recombination of alleles
e. sexual reproduction

Back 36

c. asexual reproduction

Front 37

In a human cell at prophase I, there are ____ tetrads.

Back 37

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