Campbell Biology Chapter 14 Test Bank
Questions With Verified Answers
1) Which of the following statements is correct in describing the terms monohybrid cross and
dihybrid cross? - Answers✔B) A dihybrid cross involves organisms that are heterozygous for two
characters that are being studied, and a monohybrid cross involves organisms that are
heterozygous for only one character being studied.
2) What was the most significant conclusion that Gregor Mendel drew from his experiments with
pea plants? - Answers✔B) Traits are inherited in discrete units and are not the result of
"blending."
3) How many unique gametes could be produced through independent assortment by an
individual with the genotype AaBbCCDdEE? - Answers✔B) 8
4) The individual with genotype AaBbCCDdEE can make many kinds of gametes. Which of the
following correctly describes why this situation is possible? - Answers✔C) different possible
assortment of chromosomes into gametes occurs
5) Mendel continued some of his experiments into the F2 or F3 generation in order to ________.
- Answers✔B) observe whether or not a recessive trait would reappear
6) Which of the following statements about independent assortment or segregation is correct? -
Answers✔A) The law of independent assortment describes the behavior of two or more genes
relative to one another.
7) A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail
length (T). Its genotype is HhTt. Which of the following genotypes is possible in a gamete from
this organism? - Answers✔D) HT
8) Which of the following statements correctly describes how Mendel accounted for the
observation that traits had disappeared in the F1 generation and then reappeared in the F2
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generation? - Answers✔C) Traits can be dominant or recessive, and the recessive traits were
"hidden" by the dominant ones in the F1.
9) Which of the following statements correctly explains the fact that all seven of the pea plant
traits studied by Mendel obeyed the principle of independent assortment? - Answers✔D) All of
the genes controlling the traits behaved as if they were on different chromosomes.
10) Mendel's observation of the segregation of alleles in gamete formation has its basis in which
of the following phases of cell division? - Answers✔D) anaphase I of meiosis
11) Mendel's law of independent assortment has its basis in which of the following events of
meiosis I? - Answers✔C) alignment of pairs of homologous chromosomes along the middle of
the cell
12) Use the figure and the following description to answer the question. In a particular plant, leaf
color is controlled by gene locus D. Plants with at least one allele D have dark green leaves, and
plants with the homozygous recessive dd genotype have light green leaves. A true-breeding,
dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-
pollinate. The predicted outcome of the F2 is diagrammed in the Punnett square shown in the
figure, where 1, 2, 3, and 4 represent the genotypes corresponding to each box within the square.
Which of the boxes marked 1-4 correspond to plants with dark leaves? - Answers✔D) 1, 2, and 3
13) Use the figure and the following description to answer the question. In a particular plant, leaf
color is controlled by gene locus D. Plants with at least one allele D have dark green leaves, and
plants with the homozygous recessive dd genotype have light green leaves. A true-breeding,
dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-
pollinate. The predicted outcome of the F2 is diagrammed in the Punnett square shown in the
figure, where 1, 2, 3, and 4 represent the genotypes corresponding to each box within the square.
Which of the boxes marked 1-4 correspond to plants with a heterozygous genotype? -
Answers✔C) 2 and 3
14) Use the figure and the following description to answer the question.In a particular plant, leaf
color is controlled by gene locus D. Plants with at least one allele D have dark green leaves, and
plants with the homozygous recessive dd genotype have light green leaves. A true-breeding,
dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-
pollinate. The predicted outcome of the F2 is diagrammed in the Punnett square shown in the
figure, where 1, 2, 3, and 4 represent the genotypes corresponding to each box within the square.
Which of the boxes marked 1-4 correspond to plants that will be true-breeding? - Answers✔A) 1
and 4 only
15) Skin color in a certain species of fish is inherited by a single gene with four different alleles.
How many different types of gametes would be possible in this organism? - Answers✔B) 4
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