2. A decrease in the ability of the blood to carry oxygen due to the presence of abnormal hemoglobin molecules is caused by the altering of one codon in the genome.
Tay-Sachs
Phenylketonuria
Sickle-cell anemia
Huntingdon's disease

3. The inability of the blood to manufacture the enzyme needed for the metabolism of a specific amino acid ingested is also called
Huntingdon's disease
Tay-Sachs
Phenylketonuria
Phenylenoma

4. A single change in the sequence of nitrogenous bases in a molecule of deoxyribonucleic acid would most likely result in
tetrad formation
polyploidy
nondisjunction
a protein mutation

5. Which nitrogenous base is normally used in the synthesis of ribonucleic acid but not in the synthesis of deoxyribonucleic acid?
guanine
cytosine
uracil
thymine

6. A sequence of three nitrogenous bases in a messenger-RNA molecule is known as a
codon
gene
gene family
polynucleotide

7. To produce this new variety, the project would most likely involve
amniocentesis
genetic screening
genetic engineering
inbreeding of plants with dispositions toward the expression of the genes investigated

8. Which technique would most likely be used to produce large number of genetically identical offspring from this new variety of plant?
polymerase chain reaction
hybridization
cloning
chromatography

9. According to the Hardy-Weinberg theorem, the gene pool of a population will remain stable if
no mutation occurs
the population is small
the individuals selectively choose mates with similar genetics
there is a natural event that inhibits the introduction of genetic diversity

10. In the synthesis of proteins, what is the function of messenger-RNA molecules?
To act as a template for the synthesis of deoxyribonucleic acids
To carry information that determines the sequence of amino acids
To carry the anti-codons and amino acids to the ribosomes
To carry specific enzymes for dehydration synthesis

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Correct answers: