A. Only Occurs in Mature Nerve and Skeletal Muscle Cells

Sample Questions for Exam Three

1.  Mitosis,

a.  only occurs in mature nerve and skeletal muscle cells

b.  produces cells that have the same number of chromosomes as the parent cell

c.  occurs whenever a cell needs more proteins

d.  is the process of DNA replication

e.  b and c

2.  The monomers of DNA and RNA are

a.  amino acids

b.  monosaccharides

c.  nucleotides

d.  fatty acids.

e.  nucleic acids

3.  Which of the following enzymes catalyzes the elongation of a new RNA strand?

a.  helicase

b.  primase

c.  ligase

d.  RNA polymerase

e.  DNA polymerase

4.  How many replication forks exist if there are two replication bubbles?

a.  3 replication forks

b.  3 replication forks

c.  4 replication forks

d.  5 replication forks

e.  6 replication forks

5.  The kinetochore is a region in which

a.  sister chromatids are attached to one another

b.  metaphase chromosomes become aligned

c.  chromosomes are grouped during telophase

d.  the nucleus is located prior to mitosis

e.  spindle microtubules attach

6.  Which of the following statements are true concerning human gamete cells?

a.  There are 23 homologous pairs in gamete cells

b.  There are a total of 46 chromosomes in gamete cells

c.  There are 2 sex chromosomes in gamete cells

d.  There is 1 autosome in gamete cells

e.  None of the above are true

7.  The period between cell formation and cell division is called______.

a.  interphase b. metaphase c. anaphase d. prophase e. cytokinesis

8.  Imagine that feather color in a finch species is controlled by a single gene. You mate a finch homozygous for red (pigmented) feather with a finch homozygous for ivory (unpigmented) feather and get numerous offspring, all of which have a pale, ivory-pink beak. This pattern of color expression is most likely to be an example of

a.  incomplete dominance.

b.  codominance.

c.  pleiotropy.

d.  polygenic inheritance.

e.  crossing over.

9.  A Heterozygous black (Bb) guinea pig is mated to homozygous recessive (bb) white. Predict the genotypic and phenotypic ratios expected from crossing the black F1 progeny (offspring) to

a.  The black parent

b.  The white parent

10.  When chickens with splashed white feathers are crossed with black-feathered birds, their offspring are all slate blue (Blue Andalusian). When Blue Andalusians are crossed among themselves, they produce splashed white, blue and black offspring in the ratio of 1:2:1 respectively.

a.  How are these feather traits inherited?

b. Using any appropriate symbols, indicate the genotypes for each phenotype.