chapter 4 part 2

Question 1

mostly a
reversal of prophase

Answer 1

Telophase—

Question 2

No matter how the protoplast divides, each half
typically contains

Answer 2

Mitochondria

Plastids

Endoplasmic reticulum (ER)

Vacuoles

Question 3

During prophase, the_______ band forms
just inside the plasma membrane.

Answer 3

preprophase

Question 4

is a set of
short microtubules that forms
in the center of the cell.

Answer 4

phragmoplast

Question 5

The phragmoplast, vesicle,
and walls are called the

Answer 5

cell plate

Question 6

Vacuole division is
accomplished with a

Answer 6

phragmosome.

Question 7

A set of microtubules,
actin filaments, and
cytoplasm

Answer 7

phragmosome.

Question 8

These grow outward until
they fuse with those of
the mother cell.

Answer 8

cell plate

Question 9

is referred to as reduction division.

Answer 9

meiosis

Question 10

must fuse together. In order to have a diploid zygote,

Answer 10

haploid sex cells

Question 11

occurs only in the production of reproductive cells

Answer 11

meiosis

Question 12

produces four 1N cells from one 2N cell.

Answer 12

meiosis

Question 13

Meiosis involves two rounds of division.

Answer 13

Meiosis I and meiosis II

Question 14

does not occur after the first division.

Answer 14

The S phase

Question 15

is very similar to prophase of mitosis

Answer 15

Prophase I

Question 16

what are the five stages of prophase 1

Answer 16

Leptotene

Zygotene

Pachytene

Diplotene

Diakinesis

Question 17

chromosomes
begin to condense and become
distinguishable but indistinct.

Answer 17

Leptotene

Question 18

is
present between the paired
homologous
chromosomes.

Answer 18

synaptonemal complex,

Question 19

the synapsis of
homologs

Answer 19

Zygotene

Question 20

A synapsed pair of
homologous chromosomes
is called a

Answer 20

bivalent.

Question 21

Chromosomes shorten and
thicken, Crossing-over occurs

Answer 21

Pachytene

Question 22

The homologous chromosomes
move away from each other, but
are held together by the centromeres.

Answer 22

Diplotene

Question 23

appears as a constricted region of a chromosome and plays a key role in helping the cell divide up its DNA during division

Answer 23

The centromere

Question 24

is a structure that forms between a pair of homologous chromosomes by crossover recombination and physically links the homologous chromosomes during meiosis.

Answer 24

chiasmata.

Question 25

The homologs continue to separate. Chiasmata move toward ends until they become untangled. They are paired only at the centromeres.

Answer 25

Diakinesis

Question 26

Cell division may occur without

Answer 26

nuclear division

Question 27

In numerous tissues, karyokinesis does not occur without cytokinesis. true or false

Answer 27

false

Question 28

In many ________ the nuclear envelope and nucleoli do not break down until late in mitosis, if at all.

Answer 28

algae and fungi

Question 29

have no histones and chromosomes remain mostly condensed.

Answer 29

Nuclei of dinoflagellates

Question 30

In some green algae, cytokinesis occurs by use of a

Answer 30

phycoplast.

Question 31

In red algae, cell division occurs by a _____ but the new wall grows inward from the pre-existing walls.

Answer 31

phragmoplast,

Question 32

occurs by a process of in furrowing.

Answer 32

Cytokinesis

Question 33

occurs either by infurrowing or by being pulled in two.

Answer 33

division

Question 34

The replication of organelles and their DNA is

Answer 34

episodic.

Question 35

The replication of organelles and their DNA is

Answer 35

episodic.

Question 36

appears to be continuous throughout interphase

Answer 36

Replication