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Flashcards in Chapter 11 Deck (32)
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1

Typically, how many cells contribute genetic material during sexual reproduction?

Two

2

When two haploid gametes unite, they create a diploid cell called a(n) _____

zygote

3

An organism is diploid when its cells carry which of the following?

Two sets of chromosomes

4

In sexual reproduction in eukaryotes, each parent contributes

one set of chromosomes to the offspring.

5

Which process is responsible for the production of the adult body of an animal from a zygote?

Mitosis

6

Eukaryotes that reproduce through ______ reproduction require two cells to contribute genetic material for the production of the next generation.

sexual

7

How many rounds of cell division are required for meiosis?

2

8

A zygote is created when two haploid cells, called _____, fuse.

haploid gametes

9

Gametes are haploid. Haploid means that the cells contain how many sets of chromosomes?

One

10

In sexually reproducing organisms, which type(s) of cell division requires two sequential rounds of division?

meiosis

11

The structure consisting of paired homologues along a lattice of proteins between them is called what?

Synaptonemal complex

12

A result of crossing over is genetic ____; this leads to increased genetic variation in the offspring.

recombination

13

During prophase I, all four chromatids of the two homologues become closely associated as a result of pairing, also known as _____.

synapsis

14

What involves a physical exchange of DNA segments between homologous chromosomes?

Crossing over

15

During meiosis, homologous chromosomes become closely associated in the process of pairing, or _____.

synapsis

16

When the alleles of genes that were formerly on separate homologues can be found on the same homologue which of the following has occurred?

Recombination has occurred

17

What is the name for the sites of crossing over in a chromosome?

Chiasmata

18

During which stage of meiosis do synapsis and crossing over occur?

Prophase I

19

The sites of crossing over are called ______.

chiasmata

20

In meiosis, when does DNA replication occur?

Before meiosis I only

21

During _____ I of meiosis, the homologues are pulled toward opposite poles of the cell.

anaphase

22

The sister chromatids found in the daughter nuclei at the end of telophase I are not identical to each other due to which of the following?

crossing over

23

Meiosis has how many rounds of DNA replication?

1

24

At the end of anaphase I in meiosis, each pole of the cell contains which of the following?

A haploid set of duplicated chromosomes

25

At this stage of meiosis I, the sister chromatids have reached their respective poles, and they then decondense.

Telophase

26

When meiosis proceeds without recombination, this is referred to as _____ segregation.

achiasmate

27

When a cell undergoes meiosis, 4 daughter cells are produced. In terms of the number of chromosomes, each daughter cell contains a _____ nucleus.

haploid

28

When chromosomes do not sort properly during cell division this is referred to as

nondisjunction

29

After meiosis is complete which of the following are produced?

Four daughter cells that are haploid

30

The association of homologous pairs guided by heterochromatin sequences is called which of the following?

synapsis