Completion
Complete each sentence or
statement.
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1.
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_____
are passed down from one generation to another through the _______ information stored in
cells.
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2.
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The
________ encoded by genes enable proteins to form, allowing an organism to function
normally.
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3.
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In
some cases genes become damaged, or DNA is copied incorrectly. A change in the genetic material is
called a ____________.
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4.
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When
a mutation causes harmful effects in the organism, the result is know as a
________ ___________.
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5.
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Some
genetic disorders are ___________ disorders.
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6.
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What
does recessive disorder mean in terms of how (or when) the disease will be passed on to the offspring
of the organism?
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7.
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If a
person has only one allele for the disease, the person is a __________ of the gene but does not
exhibit the disease.
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8.
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Sickle-cell anemia, Tay-Sachs disease, and cystic fibrosis are examples of ___________
genetic disorders.
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9.
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Some
genetic disorders are _____________, which means that the genes for these diseases are carried on sex
chromosomes.
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10.
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If a
trait is sex-linked, it usually appears only in _______.
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11.
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Why
does a sex-linked trait usually only appear in males?
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12.
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____________ is an example of a sex-linked disease.
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13.
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A
genetic disorder that is __________ means that a person exhibits the disease if one allele for the
disease is present.
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14.
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_____________ disease (HD) is a dominant disease.
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15.
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Review the chart below describing several genetic
disorders.
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16.
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Most genetic disorders ______ be cured.
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17.
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Genetic counselors sometimes make use of a diagram called a ___________.
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18.
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A
pedigree traces a ______ throughout a family. Such a chart can make it possible to predict whether a
person is a ___________ of a hereditary disease.
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19.
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Albinism is a genetic disorder in which the body is unable to produce the
_______ necessary for the production of ___________.
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20.
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Melanin is a pigment that gives ______ color to hair, skin, and eyes.
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21.
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Review the pedigree below. According to this pedigree, what type of trait is
albinism?
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22.
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High-energy radiation from X-rays, ultraviolet radiation, asbestos, and the chemicals
in cigarette smoke are examples of know ___________. These have been associated with causing
mutations.
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23.
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A
genetic disorder that is __________ will appear in individuals as long as there is one
allele.
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24.
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A
__________ disorder appears only when two alleles are present.
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