The Division Of Cells

Ian Howey

Cell Division

Cell division is the process by which a parent cell divides into two or more daughter cells. Cell division usually occurs as part of a larger cell cycle.

Mitosis

Mitosis is the process by which a cell, which has previously replicated each of its chromosomes, separates the chromosomes in its cell nucleus into two identical sets of chromosomes, each set in its own new nucleus.

Meiosis

Meiosis is a special type of cell division necessary for sexual reproduction in eukaryotes, such as animals, plants and fungi. The number of sets of chromosomes in the cell undergoing meiosis is reduced to half the original number, typically from two sets to one set.

Cell Division Quiz


Oxygen and food move into the cell by passing through the cell's


As a cell grows larger it requires more and more energy and thus needs greater amounts of ________________?


As a cell gets bigger, both its cell membrane and its _________ get bigger.


Instead of continuing to grow, cells _________ once they reach a certain size.


In what stage does a Cell spend the majority of its life?


________________________ is the division of the cytoplasm of the cell.


What stage of the cell cycle is this Plant Cell in?


_________________ results in new cells with genetic material that is identical to the original cell.

During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?


During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?


What are stem cells?


What are the phases of the cell cycle? (remember IPMATC)


What is the first stage of mitosis?


The number of cells increase as an organism grows in this process: ____________




Mitosis Quiz

1. Examine the picture of the cell. What phase is the cell in?

prophase

anaphase

metaphase

telophase

2. What is the structure labeled X on the picture?

centriole

spindle

chromosome

chromatid

3. During which phase do chromosome first become visible?

interphase

telophase

metaphase

prophase

4. A cell with 10 chromosomes undergoes mitosis. How many daughter cells are created? ___ Each daughter cell has ___ chromosomes.

2, 10

10, 2

1, 10

2, 20

5. What structure is responsible for moving the chromosomes during mitosis?

nucleolus

nuclear membrane

spindle

cytoplasm

6. Cytokinesis begins in which phase?

metaphase

telophase

prophase

anaphase

7. Cells will generally divide when?

they are 10 hours old

they become infected

they become too large

they have no food

8. Which phase occurs directly after metaphase?

anaphase

telophase

metaphase

prophase

9. During which phase does the DNA make a copy of itself?

prophase

metaphase

interphase

anaphase

10. Each chromosome consists of 2 _____.

centrofibers

chromatids

daughter cells

centrioles



Meiosis Quiz

1. Meiosis results in _____

2 haploid daughter cells

4 haploid daughter cells

2 diploid daughter cells

4 diploid daughter cells


2. Which of the following cells undergo meiosis?

sperm cells

liver cells

unicellular organisms

all of these


3. The picture depicts what phase of meiosis


propase 1

prophase 2

anaphase 1

anaphase 2


4. Crossing-over occurs during:

anaphase 1

metaphase 1

prophase 1

prophase 2


5. Meiosis is a type of cell division that produces:

zygotes

chromosomes

DNA

gametes


6. Which of the following distinguishes prophase 1 of meiosis from prophase of mitosis?

homologous chromosomes pair up

spindle forms

nuclear membrane breaks down

chromosomes become visible


7. A cell with a diploid number of 24 undergoes meiosis, how many chromosomes are in each daughter cell?

6

12

24

48


8. The picture depicts what stage of meiosi


prophase 1

anaphase 1

metaphase 1

metaphase 2