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33 notecards = 9 pages (4 cards per page)

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chapter 13

front 1

A triploid cell contains three sets of chromosomes. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following?

back 1

63 chromosomes in 21 sets of 3

front 2

Which of the life cycles is typical for plants and some algae?

back 2

III only

front 3

Which of the following is true of a species that has a chromosome number of 2n = 16?

back 3

Each cell has eight homologous pairs

front 4

Tetrads of chromosomes are aligned at the equator of the spindle; alignment determines independent assortment.

back 4

II

front 5

The human genome is minimally contained in which of the following?

back 5

Every human cell

front 6

Which of these statements is false?

back 6

At sexual maturity, ovaries and testes produce diploid gametes by meiosis.

front 7

Which diagram represents anaphase I of meiosis?

back 7

I

front 8

A karyotype results from which of the following?

back 8

the ordering of human chromosome images

front 9

Synaptonemal complexes form or are still present.

back 9

I only

front 10

Which sample of DNA might be from a nerve cell arrested in G0 of the cell cycle?

back 10

I

front 11

When we see chiasmata under a microscope, that lets us know which of the following has occurred?

back 11

prophase I

front 12

When homologous chromosomes crossover, what occurs?

back 12

Specific proteins break the two strands and re-join them with their homologs.

front 13

After telophase I of meiosis, the chromosomal makeup of each daughter cell is

back 13

haploid, and the chromosomes are each composed of two chromatids.

front 14

Which of the following is a true statement about sexual vs. asexual reproduction?

back 14

in sexual reproduction, individuals transmit 50% of their genes to each of their offspring.

front 15

Homologous chromosomes move toward opposite poles of a dividing cell during

back 15

meiosis I.

front 16

A human cell containing 22 autosomes and a Y chromosome is

back 16

a sperm

front 17

Which sample might represent an animal cell in the G2 phase of the cell cycle?

back 17

II

front 18

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

back 18

Clone the plant asexually to produce an identical one.

front 19

If a cell has completed the first meiotic division and is just beginning meiosis II, which of the following is an appropriate description of its contents?

back 19

It has half the amount of DNA as the cell that began meiosis.

front 20

A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length (T). Its genotype is Hh

back 20

HT

front 21

Chromatids are separated from each other.

back 21

The statement is true for mitosis and meiosis II.

front 22

A tetrad includes which of the following sets of DNA strands?

back 22

two sets of sister chromatids that have synapsed

front 23

Which of the following occurs in meiosis but not in mitosis?

back 23

synapsis of chromosomes

front 24

Which of the following is an example of alternation of generations?

back 24

A diploid plant (sporophyte) produces, by meiosis, a spore that gives rise to a multicellular, haploid pollen grain (gametophyte).

front 25

In part III of Figure 13.1, the progression of events corresponds to which of the following series?

back 25

sporophyte, meiosis, spore, mitosis, gametophyte, mitosis, gametes, fertilization

front 26

Which of the following best describes the frequency of crossing over in mammals?

back 26

at least 1-2 per chromosome pair

front 27

Which of the steps takes place in both mitosis and meiosis?

back 27

3

front 28

Which of the following is a true statement about sexual vs. asexual reproduction?

back 28

In sexual reproduction, individuals transmit 50% of their genes to each of their offspring

front 29

If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of a single cell at metaphase of meiosis II would be

back 29

x

front 30

Which sample might represent a zygote?

back 30

I

front 31

In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?

back 31

Length, centromere position, staining pattern, and traits coded for by their genes.

front 32

In a life cycle such as that shown in part III of Figure 13.1, if the zygote's chromosome number is 10, which of the following will be true?

back 32

The sporophyte's chromosome number per cell is 10 and the gametophyte's is 5.

front 33

If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of the same cell at metaphase of meiosis I would be

back 33

2x