BIO 101 EXAM 3 TEST 2026 VERIFIED
QUESTIONS AND ANSWERS PASS GUIDE
◉ Why did Mendel continue some of his experiments to the F2
generation?
Answer: to observe whether or not a recessive trait would reappear
◉ What is produced if a cell completes mitosis but does not undergo
cytokinesis?
Answer: one cell with two nuclei, each identical to the nucleus of the
parent cell
◉ Measurements of the amount of DNA per nucleus were taken on a
large number of cells from a growing fungus. The measured DNA
levels ranged from 3 to 6 picograms per nucleus. In which stage of
the cell cycle would the nucleus contain 6 picograms of DNA?
Answer: G2
◉ b = black body
cn = cinnabar eyes
rb = reduced bristles
vg = vestigal wings
, The numbers in the boxes are the recombination frequences in
between the genes (in percent).
In a series of mapping experiments, the recombination frequencies
for four different linked genes of Drosophila were determined as
shown in the figure. What is the order of these genes on a
chromosome map?
Answer: b-rb-cn-vg
◉ Which of the following traits is an example of polygenic
inheritance?
Answer: skin pigmentation in humans
◉ Compared to most prokaryotic cells, eukaryotic cells typically
have
Answer: more DNA molecules and larger genomes.
◉ Which of these is a way that the sexual life cycle increases genetic
variation in a species?
Answer: by allowing crossing over
◉ Down syndrome has a frequency in the U.S. population of ~1/830
live births. In which of the following groups would you expect this
frequency to be significantly higher?
QUESTIONS AND ANSWERS PASS GUIDE
◉ Why did Mendel continue some of his experiments to the F2
generation?
Answer: to observe whether or not a recessive trait would reappear
◉ What is produced if a cell completes mitosis but does not undergo
cytokinesis?
Answer: one cell with two nuclei, each identical to the nucleus of the
parent cell
◉ Measurements of the amount of DNA per nucleus were taken on a
large number of cells from a growing fungus. The measured DNA
levels ranged from 3 to 6 picograms per nucleus. In which stage of
the cell cycle would the nucleus contain 6 picograms of DNA?
Answer: G2
◉ b = black body
cn = cinnabar eyes
rb = reduced bristles
vg = vestigal wings
, The numbers in the boxes are the recombination frequences in
between the genes (in percent).
In a series of mapping experiments, the recombination frequencies
for four different linked genes of Drosophila were determined as
shown in the figure. What is the order of these genes on a
chromosome map?
Answer: b-rb-cn-vg
◉ Which of the following traits is an example of polygenic
inheritance?
Answer: skin pigmentation in humans
◉ Compared to most prokaryotic cells, eukaryotic cells typically
have
Answer: more DNA molecules and larger genomes.
◉ Which of these is a way that the sexual life cycle increases genetic
variation in a species?
Answer: by allowing crossing over
◉ Down syndrome has a frequency in the U.S. population of ~1/830
live births. In which of the following groups would you expect this
frequency to be significantly higher?
