BIOLOGY 101 EXAM 3 | COMPLETE QUESTIONS WITH EXPERT
SOLUTIONS| 2026 LATEST UPDATED| A+
How would one explain a testcross involving F1 dihybrid flies in which more parental-type
offspring than recombinant-type offspring are produced? - (answer)The two genes are closely
linked on the same chromosome.
Refer to the life cycles illustrated in the figure. Which of the life cycles is (are) typical for most
fungi and some protists? - (answer)II only
Which of the following lists of structures correctly represents the order of increasingly higher
levels of organization of chromatin? - (answer)nucleosome, 30-nm chromatin fiber, looped
domain
Sturtevant provided genetic evidence for the existence of four pairs of chromosomes in
Drosophila in which of these ways? - (answer)Drosophila genes cluster into four distinct groups
of linked genes.
Why do histones bind tightly to DNA? - (answer)Histones are positively charged, and DNA is
negatively charged.
,During DNA replication, which of the following enzymes covalently connects segments of
DNA? - (answer)ligase
You have isolated DNA from three different cell types of an organism, determined the relative
DNA content for each type, and plotted the results on the graph shown in the figure.
Which sample(s) might represent a zygote? - (answer)I
Which of the following statements describes the major reason that the individual with the
genotype AaBbCCDdEE can make many kinds of gametes? - (answer)different possible
assortment of chromosomes into gametes
One map unit is equivalent to which of the following values? - (answer)1% frequency of
recombination between two genes
In his transformation experiments, what did Griffith observe? - (answer)Mixing a heat-killed
pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living
cells into the pathogenic form.
If there are 20 centromeres in a cell at anaphase of mitosis, how many chromosomes are there in
each daughter cell following cytokinesis? - (answer)10
, In E. coli, there is a mutation in a gene called dnaB that alters the helicase that normally acts at
the origin. Which of the following would you expect as a result of this mutation? - (answer)The
DNA strands at the origin of replication will separate, but replication will not progress.
In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" nitrogen
(15N) and then transferred them to a medium containing 14N. Which of the results in the figure
would be expected after one round of DNA replication in the presence of 14N? - (answer)D
What is a syndrome? - (answer)a group of traits typically found in conjunction with a particular
chromosomal aberration or gene mutation
Which of the following types of cells would be produced by meiosis? - (answer)a haploid animal
cell
After mixing a heat-killed, phosphorescent (light-emitting) strain of bacteria with a living,
nonphosphorescent strain, you discover that some of the living cells are now phosphorescent.
Which observation(s) would provide the best evidence that the ability to phosphoresce is a
heritable trait? - (answer)Descendants of the living cells are also phosphorescent.
SOLUTIONS| 2026 LATEST UPDATED| A+
How would one explain a testcross involving F1 dihybrid flies in which more parental-type
offspring than recombinant-type offspring are produced? - (answer)The two genes are closely
linked on the same chromosome.
Refer to the life cycles illustrated in the figure. Which of the life cycles is (are) typical for most
fungi and some protists? - (answer)II only
Which of the following lists of structures correctly represents the order of increasingly higher
levels of organization of chromatin? - (answer)nucleosome, 30-nm chromatin fiber, looped
domain
Sturtevant provided genetic evidence for the existence of four pairs of chromosomes in
Drosophila in which of these ways? - (answer)Drosophila genes cluster into four distinct groups
of linked genes.
Why do histones bind tightly to DNA? - (answer)Histones are positively charged, and DNA is
negatively charged.
,During DNA replication, which of the following enzymes covalently connects segments of
DNA? - (answer)ligase
You have isolated DNA from three different cell types of an organism, determined the relative
DNA content for each type, and plotted the results on the graph shown in the figure.
Which sample(s) might represent a zygote? - (answer)I
Which of the following statements describes the major reason that the individual with the
genotype AaBbCCDdEE can make many kinds of gametes? - (answer)different possible
assortment of chromosomes into gametes
One map unit is equivalent to which of the following values? - (answer)1% frequency of
recombination between two genes
In his transformation experiments, what did Griffith observe? - (answer)Mixing a heat-killed
pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living
cells into the pathogenic form.
If there are 20 centromeres in a cell at anaphase of mitosis, how many chromosomes are there in
each daughter cell following cytokinesis? - (answer)10
, In E. coli, there is a mutation in a gene called dnaB that alters the helicase that normally acts at
the origin. Which of the following would you expect as a result of this mutation? - (answer)The
DNA strands at the origin of replication will separate, but replication will not progress.
In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" nitrogen
(15N) and then transferred them to a medium containing 14N. Which of the results in the figure
would be expected after one round of DNA replication in the presence of 14N? - (answer)D
What is a syndrome? - (answer)a group of traits typically found in conjunction with a particular
chromosomal aberration or gene mutation
Which of the following types of cells would be produced by meiosis? - (answer)a haploid animal
cell
After mixing a heat-killed, phosphorescent (light-emitting) strain of bacteria with a living,
nonphosphorescent strain, you discover that some of the living cells are now phosphorescent.
Which observation(s) would provide the best evidence that the ability to phosphoresce is a
heritable trait? - (answer)Descendants of the living cells are also phosphorescent.
