Cancer is usually associated with mutations of genes involved in:

A. Cell growth

B. Stem cell production

C. Cell metabolism

D. Cell Division

D. Cell Division

Somatic cells are produced via

_______ reproduction.

A. Binary fission

B. Sexual

C. Asexual

D. Germ cell division

C. Asexual

The single bacterial chromosome is found in a region of the cell known as:

A. the nucleus

B. the chromosomal region

C. the cytoplasm

D. the nucleoid

D. the nucleoid

At what point during Interphase is DNA replicated?

A. during the S phase

B. during cytokinesis

C. during the G1 phase

D. during the M phase

A. during the S phase

The three phases of Interphase include...

A. G3, M, and G1

B. G1, M, and S

C. G1, G2, and M

D. G1, G2, and S

D. G1, G2, and S

Which one of the following events occurs during prophase?

A. chromosomes line up at cell equator

B. nuclear envelope disintegrates

C. cytoplasm divides

D. spindle breaks down

B. nuclear envelope disintegrates

During mitosis, a 2n parent cell nucleus divides to form:

A. two 1n daughter nuclei

B. one 2n daughter nucleus

C. four 1n daughter nuclei

D. two 2n daughter nuclei

D. two 2n daughter nuclei

What is the outcome of meiosis I?

A. sister chromatids separate

B. DNA is replicated

C. homologous chromosomes separate

D. four sex cells are formed

C. homologous chromosomes separate

The exchange of genetic material between non-sister chromatids is called:

A. crossing-over

B. replication

C. metastasis

D. synapsis

A. crossing-over

In both plant and animal cells, the mitotic spindle is organized by two ______.

A. centrioles

B. centrosomes

C. centromeres

D. microtubules

B. centrosomes

The formation of female gametes is referred to as:

A. mitosis

B. oogenesis

C. spermatogenesis

D. binary fission

B. oogenesis

Which phenomenon, along with crossing-over, increases variation, which is a major advantage of sexual reproduction?

A. synapsis

B. mutation

C. independant assortment

C. independant assortment

During Metaphase I of meiosis:

A. crossing-over occurs

B. homologous chromosomes separate

C. homologous chromosomes line up independently

D. daughter cells form

C. homologous chromosomes line up independently

During telophase:

A. chromosomes become visible

B. the nucleus and nucleolus reappear

C. the cytoplasm divides

D. the centrosomes divide

B. the nucleus and nucleolus reappear

A cell biologist is studying the phase of mitosis where sister chromatids seperate and begin to move toward the poles of the cell.  Which one of the following phases of mitosis is this biologist studying?

A. prophase

B. metaphase

C. anaphase

D. telophase

C. anaphase

C. meiosis and fertilization

If the total number of chromosomes is six, then after mitosis there will be:

A. two chromosomes in each daughter cell, one from each parent

B. twelve chromosomes in each daughter cell

C. six chromosomes in each daughter cell

C. six chromosomes in each daughter cell

If an organism has 50 chromosomes in its somatic cells, which of the following would be correct for its gametes?

A. 50 chromosomes

B. 25 chromosomes

C. 25 pairs of chromosomes

B. 25 chromosomes

A geneticist is studying the karyotupe of a person with a normal number of chromosomes.  Which of the following would be the correct chromosome configuration?

A. 22 pairs of autosomes and one pair of sex chromosomes

B. 22 autosomes and 2 sex chromosomes

C. 46 autosomal chromosomes

D. 46 autosomal chromosomes and 2 sex chromosomes

A. 22 pairs of autosomes and one pair of sex chromosomes.

A geneticist is examining the karyotype of a person and notices that this individual has three copies of chromosome 21.  Based on the information the geneticist can determine that this person has which of the following syndromes?

A. Turner syndrome

B. Down syndrome

C. Edwards syndrome

D. Klinefelter syndrome

B. Down syndrome

A basic difference between spermatogenesis and oogenesis is that in oogenesis:

A. four functional eggs are produced

B. one cell eventually completes meiosis II

C. four cells are produced and fertilization is required for completion

D. one cell is produced and fertilization is required for completion

D. one cell is produced and fertilization is required for completion

B. G1

D. cytokinesis

A. S

A scientist is studying the stage of the cell cycle where some of the organelles double in number and cell accumulates materials that will be used in the next cell division.  Which of the following stages would she be studying?

A. S

B. G1

C. G2

D. Mitosis

B. G1

Which of the following is not a reason why cell division is important in eukaryotes?

A. to repair damaged tissue

B. to replace old cells
C. to make extra copies of DNA to store for later use

D. to make new cells as the organism grows

C. to make extra copies of DNA to store for later use

Which is not a correct association?

A. Cytokinesis - division of the cytoplasm

B. Somatic - cells of the body not involved in gamete production and undergo mitosis

C. Sister chromatids - two identical chromosome arms of one chromosome

D. Mitosis - when a cell divides twice in half the chromosome number

D. Mitosis - when a cell divides twice in half the chromosome number

The greatest amount of day-to-day cariation is produced by the process of:

A. mitosis

B. meiosis

C. mutations

D. meiosis and crossing-over

D. meiosis and crossing-over

Which of the following statements about mitosis and meiosis is incorrect?

A. Meiosis - two divisions, Mitosis - one division

B. Meiosis - four daughter cells, mitosis - two daughter cells

C. Meiosis - non-identical daughter cells, Mitosis - identical daughter cells

D. Meiosis - diploid, Mitosis - haploid

D. Meiosis - diploid, Mitosis - haploid

Meiosis results in a change in chromosome number indicated by:

A. 2n to 2n

B. 2n to n

C. n to 2n

D. n to n

B. 2n to n