1|Page
BIO1610 GENETICS EXAM ACTUAL EXAM LATEST 2025 ACTUAL
EXAM WITH COMPLETE EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED ANSWERS) |ALREADY
GRADED A+| ||PROFESSOR VERIFIED||
In general, the frequency with which crossing over occurs
between two linked genes depends on __________. - ANSWER-
how far apart they are on the chromosome
Which of these descriptions of the behavior of chromosomes
during meiosis explains Mendel's law of independent assortment?
- ANSWER-The arrangement of each pair of homologous
chromosomes on the metaphase plate during metaphase I is
random with respect to the arrangements of other pairs.
Three genes (A, B, and C) at three loci are being mapped in a
particular species. Each gene has two alleles, each of which
results in a dominant or recessive phenotype. The dominant allele
of gene A is inherited with the dominant allele of gene B or C
about 50% of the time. However, the dominant alleles of genes B
and C are inherited together 14.4% of the time. Which of the
following statements describes what is happening regarding the
,2|Page
inheritance of these genes? - ANSWER-Gene A is assorting
independently of genes B and C, which are linked.
One map unit is equivalent to which of the following values? -
ANSWER-1% frequency of recombination between two genes
How does the recombination of linked genes contribute to natural
selection? - ANSWER-It maintains genetic variability in a species.
In the Hershey and Chase experiment that helped confirm that
DNA, not protein, was the hereditary material, what was the key
finding? - ANSWER-Radioactively labeled phosphorus was
present inside the infected bacteria.
In analyzing the number of different bases in a DNA sample,
which result would be consistent with the base-pairing rules? -
ANSWER-A + G = C + T
, 3|Page
Cytosine makes up 42% of the nucleotides in a sample of DNA
from an organism. Approximately what percentage of the
nucleotides in this sample will be thymine? - ANSWER-8%
What is meant by the description "antiparallel" regarding the two
strands of nucleic acids that make up DNA? - ANSWER-The 5' to
3' direction of one strand runs counter to the 5' to 3' direction of
the other strand.
During DNA replication, the leading strand is synthesized
continuously, whereas the lagging strand is synthesized as
Okazaki fragments. Why is this so? - ANSWER-DNA synthesis
can take place only in the 5' to 3' direction.
During DNA replication, an open section of DNA, in which a DNA
polymerase can replicate DNA, is called a _____ - ANSWER-
replication fork
After replication is complete, the new DNAs, called _______ are
identical to each other. - ANSWER-daughter DNA
BIO1610 GENETICS EXAM ACTUAL EXAM LATEST 2025 ACTUAL
EXAM WITH COMPLETE EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED ANSWERS) |ALREADY
GRADED A+| ||PROFESSOR VERIFIED||
In general, the frequency with which crossing over occurs
between two linked genes depends on __________. - ANSWER-
how far apart they are on the chromosome
Which of these descriptions of the behavior of chromosomes
during meiosis explains Mendel's law of independent assortment?
- ANSWER-The arrangement of each pair of homologous
chromosomes on the metaphase plate during metaphase I is
random with respect to the arrangements of other pairs.
Three genes (A, B, and C) at three loci are being mapped in a
particular species. Each gene has two alleles, each of which
results in a dominant or recessive phenotype. The dominant allele
of gene A is inherited with the dominant allele of gene B or C
about 50% of the time. However, the dominant alleles of genes B
and C are inherited together 14.4% of the time. Which of the
following statements describes what is happening regarding the
,2|Page
inheritance of these genes? - ANSWER-Gene A is assorting
independently of genes B and C, which are linked.
One map unit is equivalent to which of the following values? -
ANSWER-1% frequency of recombination between two genes
How does the recombination of linked genes contribute to natural
selection? - ANSWER-It maintains genetic variability in a species.
In the Hershey and Chase experiment that helped confirm that
DNA, not protein, was the hereditary material, what was the key
finding? - ANSWER-Radioactively labeled phosphorus was
present inside the infected bacteria.
In analyzing the number of different bases in a DNA sample,
which result would be consistent with the base-pairing rules? -
ANSWER-A + G = C + T
, 3|Page
Cytosine makes up 42% of the nucleotides in a sample of DNA
from an organism. Approximately what percentage of the
nucleotides in this sample will be thymine? - ANSWER-8%
What is meant by the description "antiparallel" regarding the two
strands of nucleic acids that make up DNA? - ANSWER-The 5' to
3' direction of one strand runs counter to the 5' to 3' direction of
the other strand.
During DNA replication, the leading strand is synthesized
continuously, whereas the lagging strand is synthesized as
Okazaki fragments. Why is this so? - ANSWER-DNA synthesis
can take place only in the 5' to 3' direction.
During DNA replication, an open section of DNA, in which a DNA
polymerase can replicate DNA, is called a _____ - ANSWER-
replication fork
After replication is complete, the new DNAs, called _______ are
identical to each other. - ANSWER-daughter DNA
