If a plant with purple, axial flowers and green, inflated pods is heterozygous for all four
genes, how many different types of gametes can it produce?
1
4
8
9
16 - ANSWER 16
In his monohybrid crosses for seed color in peas, Mendel reported 6,022 yellow seeds and
2,001 green seeds. How many of each color class were expected?
4,011 green and 4,011 yellow
All should be green
All should be yellow
6,017 yellow and 2,006 green
2,006 yellow and 6,017 green - ANSWER 6,017 yellow and 2,006 green
In the accompanying figure, the chance that individual III-2 is a heterozygous carrier is
__________.
0%
25%
1
,50%
75%
100% - ANSWER 100%
Crossing over or recombination most frequently occurs during
prophase I of meiosis
metaphase II of meiosis
prophase of mitosis
telophase of mitosis
prophase II of meiosis - ANSWER prophase I of meiosis
Crossing over is
> the place on a homologous pair of chromosomes at which a physical exchange occurs.
> an extremely rare event.
> an event that only takes place during meiosis.
> the reciprocal exchange of homologous regions of chromatids.
> not useful in mapping genes. - ANSWER the reciprocal exchange of homologous
regions of chromatids.
Why are chromosomes more easily visible under a microscope during Metaphase as
compared to G2 phase?
> They become stained by natural pigments in the cell.
> There is twice as much DNA during Metaphase than during G2 phase.
> Chromosomes are contained in the nucleus during G2 but not during metaphase.
> Proteins that bind chromosomes during Metaphase are highly visible.
2
,> They are highly condensed in Metaphase. - ANSWER They are highly condensed in
Metaphase.
The statistical interpretation of a chi-square value is determined by identifying the
__________.
mean.
degrees of freedom.
average.
P value.
joint probability. - ANSWER P value
Full pod shape ( F) is dominant to constricted pod shape ( f ), and yellow pod color ( Y) is
dominant to green pod color ( y) in pea plants. A pure-breeding green plant with full pods is
crossed with a pure-breeding yellow plant with constricted pods. The offspring are then
testcrossed. What is the expected phenotypic ratio of the offspring?
1:2:1
3:1
1:1:1:1
9:3:3:1
9:7 - ANSWER 1:1:1:1
In Guinea pigs, short hair (S) is dominant over long hair (s), rough coat (R) is dominant over
smooth coat (r), and black hair (B) is dominant over white hair (b). Which of the following
individuals could produce these (and only these) four possible gametes: SRb, Srb, sRb, srb
SSRRbb
ssRrBB
SsRrbb
3
, SsRrBb
SSRrBb - ANSWER SsRrbb
The cross AaBb x aabb is called a
dihybrid cross
backcross
reciprocal cross
testcross
monohybrid cross - ANSWER testcross
At the conclusion of mitosis, there are ______ haploid cell products produced.
0
1
2
3
4 - ANSWER 0
Red-green color blindness is an X-linked recessive disorder. A woman with normal vision
whose father was colorblind has children with a man with normal color vision. What is the
probability that their first child will be colorblind?
1/4
1/2
3/4
0
1 - ANSWER 1/4
4
genes, how many different types of gametes can it produce?
1
4
8
9
16 - ANSWER 16
In his monohybrid crosses for seed color in peas, Mendel reported 6,022 yellow seeds and
2,001 green seeds. How many of each color class were expected?
4,011 green and 4,011 yellow
All should be green
All should be yellow
6,017 yellow and 2,006 green
2,006 yellow and 6,017 green - ANSWER 6,017 yellow and 2,006 green
In the accompanying figure, the chance that individual III-2 is a heterozygous carrier is
__________.
0%
25%
1
,50%
75%
100% - ANSWER 100%
Crossing over or recombination most frequently occurs during
prophase I of meiosis
metaphase II of meiosis
prophase of mitosis
telophase of mitosis
prophase II of meiosis - ANSWER prophase I of meiosis
Crossing over is
> the place on a homologous pair of chromosomes at which a physical exchange occurs.
> an extremely rare event.
> an event that only takes place during meiosis.
> the reciprocal exchange of homologous regions of chromatids.
> not useful in mapping genes. - ANSWER the reciprocal exchange of homologous
regions of chromatids.
Why are chromosomes more easily visible under a microscope during Metaphase as
compared to G2 phase?
> They become stained by natural pigments in the cell.
> There is twice as much DNA during Metaphase than during G2 phase.
> Chromosomes are contained in the nucleus during G2 but not during metaphase.
> Proteins that bind chromosomes during Metaphase are highly visible.
2
,> They are highly condensed in Metaphase. - ANSWER They are highly condensed in
Metaphase.
The statistical interpretation of a chi-square value is determined by identifying the
__________.
mean.
degrees of freedom.
average.
P value.
joint probability. - ANSWER P value
Full pod shape ( F) is dominant to constricted pod shape ( f ), and yellow pod color ( Y) is
dominant to green pod color ( y) in pea plants. A pure-breeding green plant with full pods is
crossed with a pure-breeding yellow plant with constricted pods. The offspring are then
testcrossed. What is the expected phenotypic ratio of the offspring?
1:2:1
3:1
1:1:1:1
9:3:3:1
9:7 - ANSWER 1:1:1:1
In Guinea pigs, short hair (S) is dominant over long hair (s), rough coat (R) is dominant over
smooth coat (r), and black hair (B) is dominant over white hair (b). Which of the following
individuals could produce these (and only these) four possible gametes: SRb, Srb, sRb, srb
SSRRbb
ssRrBB
SsRrbb
3
, SsRrBb
SSRrBb - ANSWER SsRrbb
The cross AaBb x aabb is called a
dihybrid cross
backcross
reciprocal cross
testcross
monohybrid cross - ANSWER testcross
At the conclusion of mitosis, there are ______ haploid cell products produced.
0
1
2
3
4 - ANSWER 0
Red-green color blindness is an X-linked recessive disorder. A woman with normal vision
whose father was colorblind has children with a man with normal color vision. What is the
probability that their first child will be colorblind?
1/4
1/2
3/4
0
1 - ANSWER 1/4
4
