Solved by a verified expert:BIO-101 Everything Genetics Quiz (DUE THURSDAY
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The correct outcome of mitosis vs.
meiosis is
Two genetically identical cells for
mitosis vs. four genetically identical cells for meiosis
Two genetically identical cells for
mitosis vs. four genetically different cells for meiosis
Two genetically different cells for
mitosis vs. four genetically different cells for meiosis
Two genetically different cells for
mitosis vs. four genetically identical cells for meiosis
In sexually reproducing species, the
chromosome number remains stable over time because _____ and _____ always
alternate
Meiosis … mitosis
Mitosis … meiosis
Mitosis … fertilization
Meiosis … fertilization
Which of the following is the correct
series of events in meiosis?
Crossing over – separation of sister
chromatids – homologues paired – four haploid cells
Separation of sister chromatids –
homologues paired – crossing over – four haploid cells
Homologues paired – crossing over –
separation of sister chromatids – four haploid cells
Crossing over – four haploid cells –
separation of sister chromatids – homologues paired
Sister chromatids are separated from
each other.
The statement is true for mitosis
only
The statement is true for meiosis I
only
The statement is true for meiosis II only
The statement is true for mitosis and
meiosis II
A healthy couple has a son with inherited
phenylketonuria (PKU). Which is a possible conclusion?
PKU is a dominant trait
PKU is a recessive trait
PKU is a codominant trait
PKU is not determined by genes
If PKU is a monogenic disease, which is
the probability of having another affected son?
100%
50%
25%
0%
In the case described in Q5, which
would be the probability of the couple having a carrier for the
defective allele?
100%
0%
50%
25%
Which is the proportion of genotypes
in the progeny of a monohybrid cross of two heterozygotes?
1:2:1
1:1
3:1
1:3
In Q8, which would be the proportion
of phenotypes?
1:2:1
1:1
3:1
4:0
Mendel analyzed monohybrid crosses of seven
traits each with two alternative forms. How many genotypes were crossed in
total to obtain the F1?
7
14
c. 21
d. 28
In dogs, wire hair determined by the S
allele is dominant over the s allele for smooth. Which is the F1
phenotype between homozygous wire hair and smooth hair dogs?
100% smooth
100% wire hair
50% smooth, 50% wire hair
d. none
of the above
In Q11, what would be the ratio
between wire and smooth dog hair phenotypes in the F2?
2:2
4:0
1:3
3:1
Tongue rolling (T) is dominant to not
being able to roll your tongue (t). A woman who can roll her tongue
marries a man who cannot. Their first child can roll. What are the
genotypes of mother, father and child?
Tt, tt, Tt
TT, Tt, tt
tt. Tt, Tt
d. tt,
TT, tt
In Q13, what is the probability that a
second child won’t roll its tongue?
100%
50%
25%
0%
A pea plant is heterozygous for both
seed shape (S, dominant spherical and s, recessive wrinkled shape) and
seed color (Y is dominant for yellow color over y, recessive green color
seed). What will be the distribution of these two alleles in this plant’s
gametes?
100% of the gametes are SsYy
50% of the gametes are Sy, 50% are sY
25% of the gametes are SY, 25% are
Sy, 25% are sY and 25% are sy
50% of the gametes are SY, 50% are sy
A phenotype ratio of 9:3:3:1 in the
offspring of a mating of two organisms heterozygous for two traits is
expected when
only recessive traits are scored
incomplete dominance for the two
traits
c. the
gene pairs assort independently during meiosis
d. multiple
alleles are present for both traits
Which of the following genetic crosses
would be predicted to give a phenotypic ratio of 9:3:3:1?
SSYY x ssyy
SsYy x SsYy
SSyy x ssYY
none of the above
Which of the following genotypes is
not expected among the offspring of a SsYy x ssyy cross?
ssyy
SsYy
ssYy
ssYY
A creature exists in three colors: blue,
red, and purple. This trait is controlled by a single gene with 2
incomplete dominance alleles. A homozygous (BB) individual is blue, a bb
individual is red, and a heterozygous Bb individual is purple. What would
be the genotypes and phenotypes of the offspring if a blue creature were
crossed with a red one?
100% Bb blue individuals.
100% Bb purple individuals
100% Bb, 50% blue, 50% red
100% Bb, 25% blue, 50% purple, 25%
red
From Q19, in the F2, the
genotypic (BB, Bb, bb) ratios would be
4:0:0
0:4:0
1:2:1
2:0:2
And the F2 phenotypic
ratios would be
50% blue, 50% red
100% blue
100% purple
25% blue, 50% purple, 25% red
A boy whose parents and grandparents
are normal, is color-blind, a sex-linked trait. What are the genotypes for
his mother and his maternal grandmother and grandfather? Use XB
for the dominant normal condition and Xb for recessive
color-blindness.
XBXb ,Xb
Xband XbY
XBXb ,Xb
Xband XBY
XBXb , XBXb and XBY
XBXB, XBXb and XBY
A woman with color-blindness, a
sex-linked recessive trait, has a mother with normal vision. Can you
determine what her father is?
carrier for color-blindness
normal
affected by color-blindness
none of the above
The woman in Q23 marries a man with
normal vision. What is the probability they will have sons who are
color-blind?
0%
25%
50%
100%
If in a DNA sample A=30%, which is %G?
30%
25%
70%
20%
During DNA synthesis, each additional
nucleotide will be added
to the free 5’ phosphate group of the
chain
to the free 3’ phosphate group of the
chain
to the free 5’ hydroxyl group of the
chain
to the free 3’ hydroxyl group of the
chain
Which of the following statements is false?
Genes are made up of DNA
Every individual inherits thousands
of genes from each of his or her parents
Genes are found on chromosomes
Genes are passed along during sexual
reproduction, but not during asexual reproduction
A gene of 600 bases in size can code
for a maximum of
150 amino acids
200 amino acids
600 amino acids
d. 1800 amino
acids
Select the correct order based on increasing amount of genetic
information
Gene – chromosome – genome
Genome – gene – chromosome
Gene – genome – chromosome
Genome – chromosome – gene
In eukaryotic cells
replication, transcription and
translation occur in the same cellular compartment
replication, transcription and
translation occur in three different cellular compartments
replication and transcription occur
in one compartment, and translation in another one
d. there is
one unique cell compartment in which all processing of genes occurs
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