Test 1

Question 1

At what phase of mitosis will sister chromatids separate and move to the opposite poles of the cell?

Answer 1

Anaphase

Question 2

The structure that holds sister chromatids at the middle is called?

Answer 2

Centromere

Question 3

A complex of DNA and histone proteins make up the

Answer 3

Nucleosome

Question 4

The key event in metaphase is

Answer 4

Chromosomes align at cells equator

Question 5

What occurs at the centromere?

Answer 5

Chromatids remain attached to one another until anaphase.

Question 6

During which phase of mitosis do the chromatids become chromosomes?

Answer 6

Telophase

Question 7

What is a cleavage furrow?

Answer 7

A groove in the plasma membrane between daughter nuclei

Question 8

Which of the following triggers, a cells passage pass the G2 checkpoint into mitosis?

Answer 8

Mitosis promoting factor (MPF)

Question 9

Density dependent inhibition is explained by which of the following?

Answer 9

As cells become more numerous the cell surface proteins of one cell contact the adjoining cells and they stop dividing

Question 10

Which of the following is true concerning cancer cells?

Answer 10

Uncontrolled cell division and proliferation

Question 11

What is a genome?

Answer 11

The complete set of an organism’s genes

Question 12

At which stage of mitosis are chromosomes, usually photographed in the preparation of a karyotype?

Answer 12

Metaphase

Question 13

Which of the following is true of a species that has a chromosome number of 2N equals 16

Answer 13

Each cell has eight homologous pairs

Question 14

What is a monohybrid cross?

Answer 14

It involves organisms that are heterozygous for one character

Question 15

Variations in character are due to

Answer 15

The presence of two or more genes

Question 16

One advantage of using garden peas for genetic studies is that

Answer 16

Peas have a short period of germination

Question 17

When crossing an organism that is homozygous recessive for a single trait with a heterozygote what is the chance of producing an offspring with a homozygous recessive phenotype?

Answer 17

50% chance

Question 18

One function of the spindle fibres is to

Answer 18

Pull sister chromatids to the opposite poles

Question 19

A diagrammatic representation to predict the outcome of genetic crosses is called

Answer 19

A punnett square

Question 20

The immediate result of a parental crossing will result in

Answer 20

F1 generation

Question 21

The particulate hypothesis postulates that

Answer 21

Parents transmit discrete heritable units

Question 22

Why did Mendel continue some of his experiments to the F2 or F3 generation?

Answer 22

To observe, whether or not a recessive trait would reappear

Question 23

The physically expressed trait of an individual is called

Answer 23

Phenotype

Question 24

Which of the following occurs in meiosis, but not in mitosis.

Answer 24

Synapsis of chromosomes

Question 25

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

Answer 25

Synapsis of chromosomes

Question 26

Whether during mitosis or meiosis sister chromatids are held together by a protein referred to as cohesin. such molecules must have which of the following properties?

Answer 26

They must be removed before anaphase can take place

Question 27

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

Answer 27

Prophase one

Question 28

What is the transmission of traits from one generation to the next called?

Answer 28

Inheritance

Question 29

In certain plants tall is dominant too short if a heterozygous plant is crossed with a homozygous tall plant what is the probability that the offspring will be short?

Answer 29

Zero

Question 30

Which of the following is true regarding Autosomes?

Answer 30

They are all chromosomes except sex chromosomes

Question 31

What is the name of proteins that are involved in the regulation of the cell cycle and that show fluctuations and concentration during the cell cycle?

Answer 31

Cyclins