True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Genetics is the branch of biology that involves the study of how different traits are
transmitted from one generation to the next.
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2.
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Mendel discovered predictable patterns in the inheritance of traits.
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3.
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The
scientific study of heredity is called genetics.
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4.
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In
Mendel’s experiments with the flower color of pea plants, only the parental generation produced
white flowers.
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5.
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Mendel concluded that the patterns of inheritance are determined entirely by the
environment.
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6.
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The
law of independent assortment was proposed by Mendel to explain his observations of inheritance
patterns.
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7.
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Genes
on chromosomes are the units of inheritance.
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8.
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The
allele for a recessive trait is usually represented by a capital letter.
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9.
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Heterozygous individuals have two of the same alleles for a particular
gene.
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10.
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A
probability of 1/4 is equal to a probability of 75 percent.
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11.
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The
dominant allele for tallness in pea plants is represented by the letter t.
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12.
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In
codominance, two alleles are expressed at the same time.
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13.
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All
genes have only two alleles.
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14.
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A
dihybrid cross involves two pairs of contrasting traits.
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15.
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Crosses involving a study of one gene are called monohybrid crosses.
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Completion
Complete each sentence or
statement.
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16.
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A
reproductive process in which fertilization occurs within a single plant is
____________________.
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17.
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Mendel produced strains of pea plants through the process of
____________________.
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18.
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____________________ refers to the transmission of traits from parent to offspring in
sexually reproducing organisms.
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19.
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In
heterozygous individuals, only the ____________________ allele achieves expression.
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20.
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A
trait that is not expressed in the F1 generation resulting from the crossbreeding of two
genetically different, true-breeding organisms is called ____________________.
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21.
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The
principle that states that one factor may mask the effect of another factor is the principle of
____________________.
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22.
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In
Mendel’s experiments, a trait that disappeared in the F1 generation but reappeared in the F2 generation was always a ____________________.
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23.
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The
cellular process that results in the segregation of Mendel’s factors is
____________________.
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24.
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Mendel formulated two principles known as the laws of
____________________.
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25.
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An
organism that has two identical alleles for a trait is called ____________________.
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26.
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An
organism’s ____________________ refers to the set of alleles it has inherited.
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27.
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The
likelihood that a specific event will occur is called ____________________.
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In
pea plants, tallness (T) is dominant to shortness (t). Crosses between plants with these traits can
be analyzed using a Punnett square similar to the one shown below.
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28.
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Refer
to the illustration above. The parents shown in the Punnett square could have offspring with a
genotype ratio of ____________________.
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29.
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Refer
to the illustration above. The phenotype of the plant that would be represented in box “4”
of the Punnett square would be ____________________.
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30.
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A
cross involving two pairs of contrasting traits is a(n) ____________________ cross.
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