Genetics (Bio 305) quizzes Questions with 100% Verified
Answers Latest Update
Question: The collection of transcribed RNAs in a liver cell is identical to the collection of
transcribed RNAs in a muscle cell.
True False
Answer:
False
Question: Chromosomal DNA is packaged into nucleosomes and chromatin by wrapping
around proteins called __________.
Answer:
Histones
Question: Which of the following is NOT considered to be a genetic model organism?
Drosophila melanogaster Mus musculus Arabidopsis thaliana Loxodonta africana
Neurospora
Answer:
Loxodonta africana
Question: Which of the following does NOT involve base pairing interactions?
Transcription Translation Protein folding DNA replication
Answer:
Protein folding
Question: If you flip a coin three times, what is the probability that the coin will show the
same side all three times?
Answer:
Question: Match each word to its best definition: Allele Gene Phenotype Genotype
A particular form of a gene An observable trait or characteristic Discrete unit of DNA
controlling a trait The particular combination of alleles present in an individual
Answer:
Allele: A particular form of a gene Gene: Discrete unit of DNA controlling a trait Phenotype:
An observable trait or characteristic Genotype: The particular combination of alleles present
in an individual
Question: A researcher uses X-rays to induce mutations in fruit flies. He carefully examines
over 10,000 flies and finds all of the individuals with abnormal phenotypes. His study design
,is called:
A polymorphism survey Reverse genetics A selection A screen
Answer:
A selection
Question: Ten wild-type female mice were crossed to ten mice without tails. The loss of tails
is caused by a recessive mutant allele of a single gene. Assume that each female mouse
gives birth to ten baby mice. Of these 100 baby mice, 30 of were tailless and 70 had tails.
How many of the mothers were heterozygous?
73462
Answer:
6 Let A = dominant wt allele and a = recessive mutant (tailless) allele. Consider following
two possible crosses: AA x aa --> 100% Aa and Aa x aa --> 50% Aa and 50% aa (tailless).
Thus, only one type of cross produces tailless mice. If the number of tailless mice = X, the
number of total mice produced from this cross is 2x, and the number of heterozygous
mothers was (2x)/10.
Question: After crossing true-breeding yellow and green pea plants, Mendel allowed the
yellow F1 plants to self. As a result of this F1 self-cross, he observed 6000 yellow peas and
2023 green pea plants. Determine whether these data are consistent with his law of equal
segregation. Which of the following statements best describes the statistical analysis of
these data?
The Chi-squared value is 0.148 The Chi-squared value is 0.198 There are 2 degrees of
freedom The p-value is 0.92
Answer:
The Chi-squared value is 0.198
Question: In a cross between two heterozygous individuals that produced 2 progeny, what is
the probability that neither offspring has the recessive phenotype?
Answer:
0.563
Question: Assume each chromosome in the mouse contains exactly 10 genes.
Mice are diploid with a haploid chromosome number of 20.
Considering all genes in this hypothetical mouse genome, how many total alleles are
present in the mouse cell during the G1 stage of the cell cycle?
(enter a whole number only; NOTE: this is not the number of alleles for any one gene, but
rather the combined number of alleles for all genes)
Answer:
400
Since mice are diploid, there are 40 chromosomes per cell. Each chromosome has one allele
, of each of the 10 genes on that chromsome. Thus, there are 400 total alleles in each cell.
Question: Which one or more of the following genotypes will be observed among the
gamete cells resulting from meiosis of a cell that is heterozygous for the A gene? (Select all
that will be observed - no partial credit).
A AA a Aa
Answer:
Aa
Question:
Answer:
Question: In the fruit fly, Drosophila melanogaster, white eyes are more common in males
than in females, although the phenotype exists in both sexes. What type of inheritance do
you think is most likely for this trait?
Autosomal dominant X-linked dominant X-linked recessive Y linked Autosomal recessive
Answer:
X-linked recessive
Question: Turner syndrome, in which a female has only one X chromosome (XO), is the
result of nondisjunction. At which stage or stages during _spermatogenesis_ could
non-disjunction occur to produce this genotype?
Meiosis I Meiosis II Meiosis I or Meiosis II
Answer:
Meiosis I or Meiosis II
Question: An X-linked recessive gene produces red-green color blindness in humans. A
woman with normal color vision whose father was color-blind marries a color-blind man.
What is the probability that their son will be color-blind?
1/4 3/4 1 0
Answer:
Mother must be heterozygous for the colorblind allele and the father carries a color blind
allele on his one X-chromosome. You are asked about their son, so he must have inherited
the Y-chromosome from his father, making transmission from his mother the only relevant
inheritance. Because the mother is heterozygous, the probability that she passes on the
colorblindness allele = the probability that she passes on the wildtype allele = 1/2.
Question: How many single cell spores are present in a fully mature Neurospora ascus?
4 2 6 8 10
Answer:
Answers Latest Update
Question: The collection of transcribed RNAs in a liver cell is identical to the collection of
transcribed RNAs in a muscle cell.
True False
Answer:
False
Question: Chromosomal DNA is packaged into nucleosomes and chromatin by wrapping
around proteins called __________.
Answer:
Histones
Question: Which of the following is NOT considered to be a genetic model organism?
Drosophila melanogaster Mus musculus Arabidopsis thaliana Loxodonta africana
Neurospora
Answer:
Loxodonta africana
Question: Which of the following does NOT involve base pairing interactions?
Transcription Translation Protein folding DNA replication
Answer:
Protein folding
Question: If you flip a coin three times, what is the probability that the coin will show the
same side all three times?
Answer:
Question: Match each word to its best definition: Allele Gene Phenotype Genotype
A particular form of a gene An observable trait or characteristic Discrete unit of DNA
controlling a trait The particular combination of alleles present in an individual
Answer:
Allele: A particular form of a gene Gene: Discrete unit of DNA controlling a trait Phenotype:
An observable trait or characteristic Genotype: The particular combination of alleles present
in an individual
Question: A researcher uses X-rays to induce mutations in fruit flies. He carefully examines
over 10,000 flies and finds all of the individuals with abnormal phenotypes. His study design
,is called:
A polymorphism survey Reverse genetics A selection A screen
Answer:
A selection
Question: Ten wild-type female mice were crossed to ten mice without tails. The loss of tails
is caused by a recessive mutant allele of a single gene. Assume that each female mouse
gives birth to ten baby mice. Of these 100 baby mice, 30 of were tailless and 70 had tails.
How many of the mothers were heterozygous?
73462
Answer:
6 Let A = dominant wt allele and a = recessive mutant (tailless) allele. Consider following
two possible crosses: AA x aa --> 100% Aa and Aa x aa --> 50% Aa and 50% aa (tailless).
Thus, only one type of cross produces tailless mice. If the number of tailless mice = X, the
number of total mice produced from this cross is 2x, and the number of heterozygous
mothers was (2x)/10.
Question: After crossing true-breeding yellow and green pea plants, Mendel allowed the
yellow F1 plants to self. As a result of this F1 self-cross, he observed 6000 yellow peas and
2023 green pea plants. Determine whether these data are consistent with his law of equal
segregation. Which of the following statements best describes the statistical analysis of
these data?
The Chi-squared value is 0.148 The Chi-squared value is 0.198 There are 2 degrees of
freedom The p-value is 0.92
Answer:
The Chi-squared value is 0.198
Question: In a cross between two heterozygous individuals that produced 2 progeny, what is
the probability that neither offspring has the recessive phenotype?
Answer:
0.563
Question: Assume each chromosome in the mouse contains exactly 10 genes.
Mice are diploid with a haploid chromosome number of 20.
Considering all genes in this hypothetical mouse genome, how many total alleles are
present in the mouse cell during the G1 stage of the cell cycle?
(enter a whole number only; NOTE: this is not the number of alleles for any one gene, but
rather the combined number of alleles for all genes)
Answer:
400
Since mice are diploid, there are 40 chromosomes per cell. Each chromosome has one allele
, of each of the 10 genes on that chromsome. Thus, there are 400 total alleles in each cell.
Question: Which one or more of the following genotypes will be observed among the
gamete cells resulting from meiosis of a cell that is heterozygous for the A gene? (Select all
that will be observed - no partial credit).
A AA a Aa
Answer:
Aa
Question:
Answer:
Question: In the fruit fly, Drosophila melanogaster, white eyes are more common in males
than in females, although the phenotype exists in both sexes. What type of inheritance do
you think is most likely for this trait?
Autosomal dominant X-linked dominant X-linked recessive Y linked Autosomal recessive
Answer:
X-linked recessive
Question: Turner syndrome, in which a female has only one X chromosome (XO), is the
result of nondisjunction. At which stage or stages during _spermatogenesis_ could
non-disjunction occur to produce this genotype?
Meiosis I Meiosis II Meiosis I or Meiosis II
Answer:
Meiosis I or Meiosis II
Question: An X-linked recessive gene produces red-green color blindness in humans. A
woman with normal color vision whose father was color-blind marries a color-blind man.
What is the probability that their son will be color-blind?
1/4 3/4 1 0
Answer:
Mother must be heterozygous for the colorblind allele and the father carries a color blind
allele on his one X-chromosome. You are asked about their son, so he must have inherited
the Y-chromosome from his father, making transmission from his mother the only relevant
inheritance. Because the mother is heterozygous, the probability that she passes on the
colorblindness allele = the probability that she passes on the wildtype allele = 1/2.
Question: How many single cell spores are present in a fully mature Neurospora ascus?
4 2 6 8 10
Answer:
