Chapter 8

Question 1

DNA is copied during which phase of the cell cycle in eukaryotic cells?

Answer 1

S phase

Question 2

the fibers that extend from the centrioles during mitosis are called what?

Answer 2

Spindle fibers

Question 3

During the G₀ phase, cells do what?

Answer 3

exict the cell cycle

Question 4

During cell division, the DNA of a eukaryotic cell is tightly packed and coiled into structures called what?

Answer 4

chromosomes

Question 5

If an organism has a 2n number of 52, how many chromosomes will its gamets have?

Answer 5

26

Question 6

Most prokaryotic cells reproduce by a process called what?

Answer 6

binry fission

Question 7

The macromolecules that aid in the packging and coiling of DNA and help it to maintain its shape are called what?

Answer 7

histones

Question 8

two similar copies of each autosome that carry the same traits and are the same size and shape are what?

Answer 8

homologues

Question 9

During which phase of the cell cycle do tetrads form?

Answer 9

Prophase of meiosis I

Question 10

What is the end result of mitosis?

Answer 10

Two identical diploid cells

Question 11

Which organelle produces vesicles that form the cell plate

Answer 11

Golgi

Question 12

What is the purpose of synapsis and crossing-over in eukaryotic cells?

Answer 12

ensure genetic variability of offspring

Question 13

What happens when crossing-over occurs?

Answer 13

corresponding genes are exchanged between homologues

Question 14

Haploid cells are formed for the first time during what phase?

Answer 14

Meiosis I

Question 15

What does the process of oogenesis result in?

Answer 15

one oocyte and three polar bodies

Question 16

DNA is copied and chromatids form

Answer 16

Interphase

Question 17

Chromatids separate at the centromere

Answer 17

Anaphase

Question 18

Chromosomes line up on the equateor

Answer 18

Metaphase of meiosis I

Question 19

Nucleolar and nuclear envelopes break down

Answer 19

Prophase of meiosis I

Question 20

Spindle fibers disassemble

Answer 20

Telophase of meiosis II

Question 21

Chromosomes return to chromatin

Answer 21

Telophase of meiosis II

Question 22

Crossing-over occurs

Answer 22

Prophase of meiosis I

Question 23

Tetrads line up at the equator

Answer 23

Metaphase of meiosis I

Question 24

Cytoplasm is divided between offspring

Answer 24

Cytokinesis

Question 25

Homologues are pulled apart

Answer 25

Anaphase of meiosis I

Question 26

Cells grow and mature

Answer 26

Interphase

Question 27

Centrioles and spindle fibers appear

Answer 27

Prophase of meiosis I

Question 28

Two new diploid nuclei are formed

Answer 28

Telophase of mitosis

Question 29

Two new haploid nuclei are formed

Answer 29

Telophase of meiosis I

Question 30

Four new haploid nuclei are formed

Answer 30

Telophase of meiosis I

Question 31

Some cells exit the cell cylcle

Answer 31

Interphase