1 Cell Division and Replication

Question 1

Undifferentiated cells able to divide and replace cells when required are known as:

Answer 1

Stem cells

Question 2

Cells which do not normally divide but can perform mitosis should the need arise are known as:

Answer 2

Facultative dividers

Question 3

Embryonic stem cells are:

Totipotent

or

Multipotent

Answer 3

Totipotent

Question 4

________

Prometaphase

Metaphase

Anaphase

Telophase

Answer 4

Prophase

Question 5

Prophase

___________

Metaphase

Anaphase

Telophase

Answer 5

Prometaphase

Question 6

Prophase

Prometaphase

_________

Anaphase

Telophase

Answer 6

Metaphase

Question 7

Prophase

Prometaphase

Metaphase

________

Telophase

Answer 7

Anaphase

Question 8

Prophase

Prometaphase

Metaphase

Anaphase

_________

Answer 8

Telophase

Question 9

Kinetochores control the entry of a cell into anaphase at the equatorial plate - what is this called?

Answer 9

Metaphase checkpoint

Question 10

The sorting, paring and comparison of chromosomes is known as what?

Answer 10

Karyotyping

Question 11

A patient is found to display a Trisomy 21 Karyotype, what does this mean?

Answer 11

Three copies of chromosome 21

Question 12

Most of the lifecycle of a cell is spent in a non-dividing phase - what is it called?

Answer 12

Interphase

Question 13

DNA replication occurs prior to or during mitosis?

Answer 13

prior to

Question 14

the S Phase, where DNA is replicated, occurs before or after the G₂ phase?

Answer 14

Before

Question 15

What is the phase of the cell cycle between G₁ and G₂?

Answer 15

S Phase

Question 16

Terminally differentiated cells and facultative dividers both enter what phase after mitosis?

Answer 16

G₀ Phase

Question 17

What does the metaphase checkpoint prevent?

Answer 17

Progression to anaphase before the chromosomes are properly lined up

Question 18

What are the two phases of somatic cell division?

Answer 18

S Phase (synthesis)

Mitotic Phase

Question 19

during S phase, two chromosomes affixed at the centromere are known as:

Answer 19

Sister Chromatids

Question 20

the 22 homologous pairs of chromosomes are known as:

Answer 20

Autosomes

Question 21

What is the human diploid number?

Answer 21

46

Question 22

Do gamete cells contain the diploid or haploid number of chromosomes?

Answer 22

Haploid

Question 23

How many gametes are formed by meiosis in females?

Answer 23

1

Question 24

How many gametes are formed by meiosis in males?

Answer 24

4

Question 25

Does meiosis result in an **increase** *or a* **reduction** in genetic material

Answer 25

Reduction

Question 26

Two different copies of the same chromosome are known as what?

Answer 26

Homologous chromosomes

Question 27

At what point during meiosis does the crossing over of the chromosomes occur?

Answer 27

Prophase I