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GENETICS FINAL EXAM QUESTIONS
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GENETICS FINAL EXAM QUESTIONS
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GENETICS FINAL EXAM QUESTIONSGregor Mendel was:
a) an English scientist who carried out research with Charles Darwin
b) a little known Central European monk
c) an early 20th century Dutch biologist who carried out genetics research - Answers -B
Which of the following statements is true about Mendel?
a) His discoveries concerning genetic inheritance were generally accepted by the
scientific community when he published them during the mid 19th century.
b) He believed that genetic traits of parents will usually blend in their children.
c) His ideas about genetics apply equally to plants and animals. - Answers -C
Mendel believed that the characteristics of pea plants are determined by the:
a) inheritance of units or factors from both parents
b) inheritance of units or factors from one parent
c) relative health of the parent plants at the time of pollination - Answers -A
An allele is:
a) another word for a gene
b) a homozygous genotype
c) a heterozygous genotype
d) one of several possible forms of a gene - Answers -D
Phenotype refers to the ______________________ of an individual.
a) genetic makeup
b) actual physical appearance
c) recessive alleles - Answers -B
When the genotype consists of a dominant and a recessive allele, the phenotype will be
like _________________ allele.
a) the dominant
b) the recessive
c) neither - Answers -A
Assuming that both parent plants in the diagram below are homozygous, why would all
of the f1 generation have yellow phenotypes?
Help Getting Started
diagram showing the result of cross-pollination in the first 2 offspring generations--in
generation f1 all are yellow peas but in generation f2 the ratio of yellow to green peas is
3 to 1
a) because the f1 genotypes are homozygous
b) because yellow is dominant over green
c) because both parents passed on yellow alleles - Answers -B
,The idea that different pairs of alleles are passed to offspring independently is Mendel's
principle of:
a) unit inheritance
b) segregation
c) independent assortment - Answers -C
In the diagram below, what accounts for the green pea seed in the f2 generation?
Help Getting Started
diagram showing the result of cross-pollination in the first 2 offspring generations--in
generation f1 all are yellow peas but in generation f2 the ratio of yellow to green peas is
3 to 1
a) On average, 1 out of 4 offspring of heterozygous parents will be homozygous
recessive.
b) The yellow allele is dominant over the green one.
c) The f1 generation parents are homozygous yellow. - Answers -A
The idea that for any particular trait, the pair of alleles of each parent separate and only
one allele from each parent passes to an offspring is Mendel's principle of:
a) independent assortment
b) hybridization
c) segregation - Answers -C
Two identical parental generations with a yellow smooth phenotype are crossed. The
offspring include the following phenotypes: yellow smooth, yellow wrinkled, green
smooth, and green wrinkled. This is an example of?
a. a monohybrid cross
b. a pure-breeding line
c. a recombinant type
d. a late-onset condition
e. Quadhybrid cross - Answers -C
What are the two basic rules of probability?
A) The Product Rule
B) The Law of Segregation
C) The Sum Rule
D) Both A and B
E) All of the above - Answers -D
What type of bond joins one nucleotide to another in one DNA strand?
A. Hydrogen bonds
B. phosphodiester bonds
C. ionic bonds
D. nucleic bonds - Answers -B
What is the correct pairing of nitrogenous bases in DNA?
A. A to G, T to C
, B. A to C, T to G
C. A to T, G to C
D. none of the above - Answers -C
What strand is replicated continuously during DNA replication?
A. leading strand
B. Okazaki fragments
C. lagging strand
D. continuous strand - Answers -A
Which enzyme is responsible for the addition of nucleotides when forming a new DNA
strand?
A. RNA Polymerase
B. DNA Ligase
C. DNA Polymerase I
D. DNA Polymerase III - Answers -D
In the semiconservative model of DNA replication:
A. one of the two "daughter" double helixes consists entirely of original DNA strands.
B. one strand of each new double helix is conserved from the parent molecule and the
other is newly synthesized
C. both "daughter" double helixes carry blocks of original DNA interspersed with blocks
of newly synthesized material.
D. both "daughter" double helixes consist of entirely newly synthesized DNA. - Answers
-B
What are two different types of mutations? - Answers -Forward mutation and reverse
mutation (reversion)
Which of the following is not a classification of a mutation?
a. Inversion
b. Deletion
c. Substituion
d. Elimination - Answers -D
The removal of an amino group (-NH2) from normal DNA:
a. Depurination
b. Translocation
c. Deamination
d. Elimination - Answers -C
Which of the following is NOT a DNA repair mechanism?
a. Nucleotide excision repair
b. Methyl-directed mismatch repair
c. Amine excision repair
d. Base excision repair - Answers -C
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