Campbell Biology Chapter 14 Test Bank 100% Correct!!
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Course
Campbell Biology
Institution
Campbell Biology
1) Which of the following statements is correct in describing the terms monohybrid cross and
dihybrid cross? - ANSWER 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 ...
Campbell Biology Chapter 14 Test
Bank 100% Correct!!
1) Which of the following statements is correct in
describing the terms monohybrid cross and
dihybrid cross? - ANSWER 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? - ANSWER 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? - ANSWER 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? - ANSWER 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 ________. -
ANSWER B) observe whether or not a recessive trait would reappear
6) Which of the following statements about independent assortment or segregation is correct? -
ANSWER 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? - ANSWER 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 generation? -
ANSWER 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? - ANSWER 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? - ANSWER D) anaphase I of meiosis
11) Mendel's law of independent assortment has its basis in which of the following events of meiosis
I? - ANSWER C) alignment of pairs of homologous chromosomes along the middle of the cell
19) Albinism is a recessive trait. A man and woman who both have normal pigmentation have one
child out of three who has albinism (without melanin pigmentation). What are the genotypes of this
child's parents? - ANSWER C) Both parents must be heterozygous.
20) A black guinea pig crossed with a guinea pig with albinism produced 12 black offspring. When the
albino was crossed with a second black animal, six blacks and six albinos were obtained. What is the
best explanation for this genetic situation? - ANSWER A) Albinism is a recessive trait; black is a
dominant trait.
21) Gray seed color in peas is dominant to white. Assume that Mendel conducted a series of
experiments where plants with gray seeds were crossed among themselves, and the following
progeny were produced: 302 gray and 98 white. What is the most probable genotype of each
parent? - ANSWER B) Gg × Gg
22) When Mendel crossed yellow-seeded and green-seeded pea plants, all the offspring were yellow-
seeded. When he took these F1 yellow-seeded plants and crossed them to green-seeded plants,
what genotypic ratio was expected? - ANSWER C) 1:1
23) Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t).
What fraction of the progeny of crosses BbTt × BBtt will be expected to have black fur and long tails?
- ANSWER C) 1/2
24) In pea plants, the tall phenotype is dominant to the dwarf phenotype. If a heterozygous pea
plant is crossed with a homozygous tall pea plant, what is the probability that the offspring will be
dwarf in size? - ANSWER D) 0
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