Cell Reproduction Review

1.2.2 Analyze how cells grow and reproduce in terms of interphase, mitosis, and cytokinesis.

Cell Cycle:

Look at the diagram of the cell cycle.

When does the duplication of DNA occur? What is this phase called?

What do GI and G2 represent?

Does mitosis include cytokinesis (division of the cytoplasm)?

Put the following stages of mitosis (cell division) in order.

3.2.1 Explain the role of meiosis in sexual reproduction and genetic variation.

MITOSIS / MEIOSIS
Type of reproduction
(Asexual or sexual)
Chromosome number of mother cell (1N=haploid or 2N=diploid)
Chromosome number of daughter cells (1N=haploid or 2N=diploid)
Number of cell divisions
Number of cells produced
When does replication happen?

Below is a table of sources of genetic variation.

SOURCES OF VARIATION / Description
Crossing over
Random assortment of chromosomes
Gene mutations
Nondisjunction
fertilization

In the above picture, the smaller yeast cell is forming by a process called budding (pinching off of the larger yeast cell). What type of reproduction is shown? Sexual or asexual, explain.

What type of reproduction is shown in the flower diagram above? Sexual or Asexual, explain.

Which type of reproduction is pictured on the left?

What type of organism is pictured on the left?

Released Questions

1.  What advantage do sexually reproducing organisms have over asexually reproducing organisms?

a.  genetic variation

b.  genetic stability

c.  increased fertilization rate

d.  increased reproductive rate

2.  Before mitosis begins, which happens before the nucleus starts dividing?

a.  The cytoplasm separates.

b.  The DNA replicates.

c.  The sister chromatids separate.

d.  The homologous chromosomes cross over.

3.  What is the result when a single cell reproduces by mitosis?

a.  two cells with genetic material identical to the parent cell

b.  two cells with half the genetic material of the parent cell

c.  four cells with half the genetic material of the parent cell

d.  four cells with genetic material identical to the parent cell

4.  What process produces many variations in phenotypes?

a.  independent assortment

b.  asexual reproduction

c.  regeneration

d.  cloning

5.  This diagram shows a diploid cell with

two pairs of homologous chromosomes.

Due to independent assortment, what

is the possible genetic make-up of

gametes produced by this organism?

a.  SsTt b. Ss, Tt c. S, s, T, t d. ST, St, sT, st

6.  A cloned plant has a diploid chromosome number of 12. What is

the diploid chromosome number of the plant cell that was used to produce the

cloned plant?

a.  6

b.  12

c.  18

d.  24

7.  Which process is an example of asexual reproduction?

a.  an amoeba divides in half to form two amoebas

b.  a bee transfers pollen from one flower to another

c.  female fish deposits eggs on a rock, then a male fish releases

sperm on them

d.  Earthworms exchange sperm

8.  Which genetic abnormality can be identified through karyotyping?

a.  point mutation

b.  recessive allele

c.  extra chromosome

d.  sex-linked allele