Gen. Bio

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3. 1 point Check
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4. 1 point Back to
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5. A strand of DNA with the
sequence A A C T T G will
have a complimentary strand
with the following sequence.
a. CCAGGT c. TTCAAG
b. AACTTG d. TTGAAC
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6. d. TTGAAC
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7. A pedigree chart shows:
a. The genotypic ratios of the
offspring.
b. The types of gametes produced
by the parents.
c. The pattern of inheritance of a
specific gene.
d. The genotypes of any parents.
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8. c. The pattern of inheritance
of a specific gene.
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9. Normal human eggs have:
a. 22 autosomes and an X
chromosome.
b. 22 autosomes and a Y
chromosome.
c. 23 autosomes
d. 46 chromosomes.
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10. a. 22 autosomes and an X
chromosome.
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11. Which of the following factors could
lead to variations in the offspring
of asexually reproducing
organisms?
a. Crossing over
b. Fertilization
c. Mutations
d. Independent assortment
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12. 1 point Back to
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c. Mutations

13. A chart used to determine the
offspring of a genetic cross is
called a _________.
a. Cross chart
b. Periodic table
c. Punnett square
d. Genetic square
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14. c. Punnett square
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15. The subunits of DNA are nucleotides consisting
of _______.
a. A sugar, a carbon group, and a nitrogen-
containing base.
b. A sugar, a phosphate group, and a nitrogen-
containing base.
c. A sugar, a phosphate group, and an oxygen-
containing base.
d. A lipid, a phosphate group, and a nitrogen-
containing base.
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16. b. A sugar, a phosphate group,
and a nitrogen-containing
base.
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17. The bond between a phosphate
group and the ribose sugar group
in RNA is called ___________.
a. Phosphodiester linkage
b. Peptide bond
c. Glycosidic bond
d. Amide bond
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18. a. Phosphodiester linkage
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19. In a family of four including a normal
mother, a normal father, a color
blind son and a normal son; who do
you think has the defective X gene
other than the affected son?
a. The mother c. The normal son
b. The father d. The affected son
only
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20. a. The mother
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21. A black cow and brown bull are
mated. Each is homozygous and
black is dominant to brown. What
is the chances that the offspring
will be brown?
a. 75% c. 0%
b. 25% d. 50%
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22. c. 0%
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23. In humans the genes for normal
blood clotting is dominant to the
gene for hemophilia. This gene is
on the X chromosome. A woman
heterozygous for the trait (a
carrier) marries a man with
hemophilia. What is the probability
of the couple having a normal son?
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24. 25%
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25. A human female “carrier” who is
heterozygous for the
recessive, sex-linked trait
causing red-green color
blindness marries a normal
male. What proportion of their
male children will have red-
green color blindness?
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26. 50%
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27. It is a region of DNA
where RNA polymerase
binds and transcription
begins
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28. 2 points Back to
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Promoter

29. What molecule picks up amino
acids and brings them to the
ribosome?
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30. 2 points Back to
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tRNA

31. Where does translation occur?
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32. At the ribosomes in the
cytoplasm of the cell
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33. How old do Paleontologists
believe the Earth is?
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34. 4.5 billion years
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35. 3 points Check
It is a law states that during the
formation of gametes (eggs or sperm),
the two alleles responsible for a trait
separate from each other. Alleles for a
trait are then “recombined” at
fertilization, producing the genotype for
the traits of the offspring.

36. Law of Segregation
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37. It is a process of producing
genetically identical
individuals of an
organisms either naturally
or artificially.
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38. Cloning
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39. 3 points Check

40. Autosomal Dominant
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41. If one parent has type A
blood and the other
parent has type B blood,
what blood type will be
the offspring denoted by
the white square and
circle have?
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42. Type O
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