Assignment

Part 1: Heredity

1. Matching: Match the following with the appropriate definition.

____ Genotype             a. When there is 1 recessive and 1 dominant allele present
____ Phenotype            b. Alternative form of a gene located on chromosomes
____ Allele                    c. When either 2 recessive or dominant alleles are present
____ Homozygous         d. An individual's observable traits
____ Heterozygous        e. Genetic makeup of an organism

2. When an allele is expressed regardless of its allelic partner, we call this allele
a. Incomplete
b. Polygenic
c. Recessive
d. Dominant

3. In pea plants, round seeds (R) are dominant to dented seeds (r). Complete the following mono-hybrid Punnett square and use this cross to complete questions 4-6.

4. Which of the following genotypes would provide us with a round seed phenotype?
a. RR
b. Rr
c. rr
d. A and B
e. B and C

5. In a genetic cross of two plants that are heterozygous for the seed shape trait, what fraction of the offspring should have round seeds?
a. 1/4
b. 1/2
c. 3/4
d. All

6. What fraction of the offspring should have dented seeds?
a. 1/4
b. 1/2
c. 3/4
d. All

Part 2: Molecular Biology

1. Use the following chart to convert the given measurements

150 g = _____________________ mg = _____________________ μg
14 m = _____________________ mm = _____________________ μm
337 l = ______________________ ml = ______________________ μl

2. DNA is made up of a phosphate group, an organic base and
a. A sugar
b. A protein
c. A molecule of ATP
d. A Ribosome

3. Which of the following is NOT considered a purine base?
a. Adenine
b. Guanine
c. Cytosine
d. Both A and B

4. In DNA replication, the helix is opened and untwisted by
a. Ligase
b. Helicase
c. Polymerase
d. Primase

5. Okazaki fragments are used to elongate
a. The leading strand toward the replication fork
b. The lagging strand toward the replication fork
c. The leading strand away from the replication fork
d. The lagging strand away from the replication fork

6. If one side of a DNA molecule contains the following sequence of nucleotides, AGTCCG, its complementary sequence would be
a. GCCTGA
b. AGTCCG
c. TCAGGC
d. CTGAAT
e. None of the above

7. Transcription is initiated when RNA polymerase binds to
a. A promoter
b. An initiator
c. A transcriptor
d. A codon

8. In the process of transcription
a. DNA is copied into tRNA
b. A polypeptide is formed
c. DNA is replicated
d. mRNA is formed with base sequences complementary to those of DNA

9. True or False: A DNA molecule will have the same amount of adenine and thymine.

10. True or False: Thymine complements and will bind to adenine in both DNA and RNA.

11. True or False: The purpose of gel electrophoresis is to separate molecules of DNA, RNA, etc based on size.

12. True or False: Larger fragments will travel through the gel faster than smaller fragments.

13. In gel electrophoresis, the DNA will run to the
a. Red anode
b. Red cathode
c. Black anode
d. Black cathode.