Biology 101 Ch8

Front 1

asexual reproduction

Back 1

The creation of offspring carrying genetic information by just a single parent is called

Front 2

Sexual reproduction is more likely to increase genetic variation than is asexual reproduction.

Back 2

Which one of the following is a difference between sexual and asexual reproduction?

Front 3

some gene variants in common and some variants not found in the other.

Back 3

With the exception of identical twins, siblings who have the same two biological parents are likely to look similar, but not identical, to each other because they have

Front 4

all cells come from cells

Back 4

Virchow's simple and profound principle, stated formally in 1858, was that

Front 5

tightly linked together at the centromere.

Back 5

Sister chromatids are

Front 6

are housed in a membrane-enclosed nucleus.

Back 6

Compared to prokaryotic chromosomes, eukaryotic chromosomes

Front 7

sister chromatids

Back 7

Prior to mitosis, each chromosome of a eukaryotic cell consists of a pair of identical structures called

Front 8

interphase

Back 8

Eukaryotic cells spend most of their cell cycle in which phase?

Front 9

cytokinesis.

Back 9

The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called

Front 10

cell growth and duplication of the chromosomes

Back 10

occurs during interphase?

Front 11

prophase.

Back 11

The phase of mitosis during which the nuclear envelope fragments and the nucleoli disappear is called

Front 12

metaphase

Back 12

During which phase of mitosis do the chromosomes line up on a plane located equidistant from the two spindle poles?

Front 13

telophase

Back 13

which phase of mitosis does the nuclear envelope re-form and the nucleoli reappear?

Front 14

A cell plate forms

Back 14

Which of the following is a feature of plant cell division that distinguishes it from animal cell division?

Front 15

Plant cell division must maintain the integrity of the cell wall

Back 15

Which of the following is likely to account for the difference between plant and animal cell cytokinesis?

Front 16

It must be able to control the timing and rate of cell division in different parts of its body.

Back 16

Which of the following must occur for a plant or animal to grow and develop normally?

Front 17

the absence of growth factors

Back 17

Which of the following is probably the main factor responsible for the phenomenon of density-dependent inhibition?

Front 18

are permanently in a state of nondivision.

Back 18

Mature human nerve cells and muscle cells

Front 19

does not metastasize.

Back 19

A benign tumor differs from a malignant tumor in that a benign tumor

Front 20

homologous chromosomes.

Back 20

Two chromosomes in a nucleus that carry loci for the same traits in the same positions on the chromosome but specify different versions of some traits constitute a pair of

Front 21

prophase I

Back 21

During which stage of meiosis do synapsis and the formation of tetrads occur?

Front 22

possible combinations of characteristics.

Back 22

Independent orientation results in an increase in the number of

Front 23

can reveal alterations in chromosome number.

Back 23

Karyotyping

Front 24

members of a chromosome pair fail to separate.

Back 24

Nondisjunction occurs when

Front 25

inversion

Back 25

If a chromosome fragment breaks off and then reattaches to the original chromosome but in the reverse direction, the resulting chromosomal abnormality is called a(n)
Answer

Front 26

the chromosomal changes in cancer are usually confined to somatic cells.

Back 26

Cancer is not usually inherited because