Chapter 11 : Meiosis & Sexual Reproduction

Front 1

Which of the following describes why or how recombinant chromosomes add to genetic variability?

Back 1

Genetic material from two parents is combined on the same chromosome.

Front 2

Meiosis II is similar to mitosis because

Back 2

Sister chromatids separate

Front 3

Homologous chromosomes synapse during the S phase of meiosis.

Back 3

False

Front 4

Homologous chromosomes behave independently in mitosis.

Back 4

True

Front 5

Homologous chromosomes travel together to the metaphase plate during meiosis I.

Back 5

True

Front 6

Crossing over between nonsister chromatids of homologous chromosomes is indicated by the presence of chiasmata.

Back 6

True

Front 7

Each parent contributes one set of homologous chromosomes to an offspring.

Back 7

True

Front 8

Cell in prophase I is not considered to be a haploid cell.

Back 8

True

Front 9

If meiosis did not occur in sexually reproducing organisms, then

Back 9

chromosome number would double in each generation.

Front 10

How many chromosomes and how many chromatids are present in a haploid cell during metaphase if a diploid cell from the organism has 48 chromosomes during G1?

Back 10

24 and 48

Front 11

A cell in G2 before meiosis compared with one of the four cells produced by that meiotic division has

Back 11

four times as much DNA and twice as many chromosomes.

Front 12

What are autosomes?

Back 12

1.

any chromosome that is not a sex chromosome.

Front 13

The DNA content of a diploid cell is measured in the G1 phase. After meiosis I, the DNA content of one of the two cells produced would be

Back 13

equal to that of the G1 cell.

Front 14

Which of the following is a major difference between mitosis and meiosis?

Back 14

Homologous chromosomes associate only in meiosis.

Front 15

Most human somatic cells are

Back 15

Diploid

Front 16

What is a karyotype?

Back 16

a pictorial display of an individual's chromosomes

Front 17

How many chromatids are present in metaphase II in a cell undergoing meiosis from an organism in which 2n = 24?

Back 17

24

Front 18

Pairs of homologous chromosomes

Back 18

have genes for the same traits at the same loci.

Front 19

What is a major difference between mitosis and meiosis?

Back 19

Homologous chromosomes associate only in meiosis.

Front 20

Why is there no duplication of the DNA between meiosis I and meiosis II?

Back 20

To reduce the chromosome number to haploid in the resulting daughter cells

Front 21

How does prophase I differ from prophase II?

Back 21

During prophase I there is one diploid cell; during prophase II there are two haploid cells.

Front 22

Asexual reproduction of a diploid organism would

Back 22

produce identical offspring.

Front 23

The restoration of the diploid chromosome number after halving in meiosis is due to

Back 23

fertilization

Front 24

Homologous and Homologs refer to structures with similar, but not identical, DNA molecules.

Back 24

True

Front 25

A cell in G2 before meiosis compared with one of the four cells produced by that meiotic division has

Back 25

four times as much DNA and twice as many chromosomes

Front 26

During which stage of meiosis do chromatids separate completely?

Back 26

Anaphase II

Front 27

Each chromatid contains a single linear DNA molecule states the relationship between DNA molecules and chromatids

Back 27

True

Front 28

The DNA content of a diploid cell is measured in the G1 phase. After meiosis I, the DNA content of one of the two cells produced would be

Back 28

equal to that of the G1 cell