biology 1 lab exercise 10 Flashcards


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1

Which of the following is part of the cell duplication machinery found in animals, but not in plants?

centrosome

2

During the M phase, the division of cell cytoplasm is also known as:

cytokinesis

3

Secondary spermatocytes form from:

the process of Meiosis I.

4

In plant cells, cytokinesis takes place by formation of a ____________, whereas in animal cells, the ______________ is responsible for cytokinesis?

cell plate; cleavage furrow

5

At the end of the first meiotic division, each chromosome consists of:

two sister chromatids

6

Members of a homologous pair of chromosomes:

are identical in size and appearance.

7

a haploid cell that participates in the fertilization process (check all that apply):

gamete

sperm

egg

8

Homologous chromosomes synapse and crossing over occurs.

This statement is true for meiosis I only.

9

in meiosis I

Homologous chromosomes synapse and crossing over occurs.

10

Human somatic cells normally have 46 chromosomes. How many chromosomes does a cell in anapahse (followng splitting os centromeres and prior to cytokinesis) have?

46

11

Genetic recombination in the form of crossover takes place.

in meiosis I only.

12

crossover takes place in

meiosis I

13

The process of chromosome distribution between two daughter cells is known as:

mitosis

14

In a given organism, how do cells at the completion of meiosis compare with cells that are just about to begin meiosis?

Cells that have completed meiosis have half the number of chromosomes and 1/4 the amount of DNA as those just beginning meiosis.

15

What is the function of the kinetochore microtubules in mitosis?

separation of chromosomes.

16

Gene duplication, or DNA replication tekas place during:

S phase

17

Under the compound light microscope, which of the following structures is visible in the mitotic cell, but is not visible in interphase.

chromosomes

18

A cell divides to form two cells that are genetically identical to the parent cell.

This statement is true for mitosis only.

19

In mitosis

A cell divides to form two cells that are genetically identical to the parent cell.

20

In which stage of meiosis does crossover take place?

prophase I

21

Independent assortment of homologous chromosomes takes place.

This statement is true for meiosis I only

22

Independent assortment of homologous chromosomes takes place.

in meiosis I

23

What are the three cell cycle checkpoints?

G1

G2

M

24

Centromeres uncouple and chromatids separate from each other.

This statement is true for mitosis and meiosis II.

25

In mitosis and meiosis

Centromeres uncouple and chromatids separate from each other.

26

Mitosis occurs in:

eukaryotes

27

For which of the following processes is there an unequal distribution of cytoplasm?

meiosis in females

28

The fusion of two games is known as:

fertlization

29

A pair of chromosomes that contain information for the same features, but may carry different versions of that information are:

homologous chromosomes

30

where does Genetic recombination in the form of crossover takes place .

in meiosis I