Transcript Genetics Review

Unit 7 Genetics Review
1.) A person that is heterozygous for
type B blood has which of the
following genotypes?
A. IBIB
B. IAi
C. ii
D. IBi
1.) A person that is heterozygous for
type B blood has which of the
following genotypes?
A. IBIB
B. IAi
C. ii
D. IBi
2. A diagram that traces the
inheritance of a single gene
throughout several generations of a
family is called
A. A karyotype
B. A pedigree
C. A genetic map
D. A genetograph
2. A diagram that traces the
inheritance of a single gene
throughout several generations of a
family is called
A. A karyotype
B. A pedigree
C. A genetic map
D. A genetograph
3. If a female fruit fly homozygous for
white eyes (XrXr) is crossed with a redeyed male (XRY), what percent of their
offspring who have white eyes?
A.
B.
C.
D.
0%
25%
50%
75%
3. If a female fruit fly homozygous for
white eyes (XrXr) is crossed with a redeyed male (XRY), what percent of their
offspring who have white eyes?
r
r
X
X
A. 0%
B. 25%
C. 50%
D. 75%
XR X R X r
XR Xr
Xr y
Xr y
y
4. A heterozygous man for blood type B
marries a woman heterozygous for blood
type A. The chance that their first child will
have type O blood is…
A. 0%
B. 25%
C. 50%
D. 75%
4. A heterozygous man for blood type B
marries a woman heterozygous for blood
type A. The chance that their first child will
have type O blood is…
A. 0%
B. 25%
C. 50%
D. 75%
5. Sequence the following events of meiosis in the
order in which they occur:
1. Homologous chromosomes line up along the equatorial plate
2. Sister chromatids separate from each other
3. The exchange of genetic material with homologous chromosomes
4. Homologous chromosomes separate from each other
5. The end of telophase I leads to haploid cells
A.
B.
C.
D.
E.
1, 2, 4, 3, 5
4, 1, 2, 3, 5
3, 1, 4, 5, 2
2, 5, 1, 4, 3
4, 5, 2, 3, 1
5. Sequence the following events of meiosis in the
order in which they occur:
1. Homologous chromosomes line up along the equatorial plate
2. Sister chromatids separate from each other
3. The exchange of genetic material with homologous chromosomes
4. Homologous chromosomes separate from each other
5. The end of telophase I leads to haploid cells
A.
B.
C.
D.
E.
1, 2, 4, 3, 5
4, 1, 2, 3, 5
3, 1, 4, 5, 2
2, 5, 1, 4, 3
4, 5, 2, 3, 1
6. Meiosis results in
A. 2 diploid cells
B. 4 diploid cells
C. 2 haploid cells
D. 4 haploid cells
6. Meiosis results in
A. 2 diploid cells
B. 4 diploid cells
C. 2 haploid cells
D. 4 haploid cells
7. Which of the following represents the
proportion and type of gametes produced by an
individual with the genotype Pp?
A. ½ Pp and ½ PP
B. ¾ Pp and ¼ pp
C. ½ P and ½ p
D. ¾ P and ¼ p
E. ¼ P and ¾ p
7. Which of the following represents the
proportion and type of gametes produced by an
individual with the genotype Pp?
A. ½ Pp and ½ PP
B. ¾ Pp and ¼ pp
C. ½ P and ½ p
D. ¾ P and ¼ p
E. ¼ P and ¾ p
8. Brown is dominant to red. Right handedness is
dominant to left. If two heterozygous parents have a
child, what are the chances of having a red headed, left
handed child?
A.
B.
C.
D.
E.
1/16
2/16
4/16
9/16
12/16
8. Brown is dominant to red. Right handedness is
dominant to left. If two heterozygous parents have a
child, what are the chances of having a red headed, left
handed child?
A.
B.
C.
D.
E.
1/16
2/16
4/16
9/16
12/16
9. What is the goal of meiosis?
A.
B.
C.
D.
Produce cells with unique genetic material
Produce genetically identical cells
Create unique cells by introducing mutations
Repair and replace damaged cells
9. What is the goal of meiosis?
A.
B.
C.
D.
Produce cells with unique genetic material
Produce genetically identical cells
Create unique cells by introducing mutations
Repair and replace damaged cells
10. A man who is homozygous for curly hair
and a woman who is homozygous for straight
hair create a child who has wavy hair. Which
type of inheritance pattern is shown?
A.
B.
C.
D.
E.
Dominance
Incomplete dominane
Multiple alleles
Linkage
Crossing-over
10. A man who is homozygous for curly hair
and a woman who is homozygous for straight
hair create a child who has wavy hair. Which
type of inheritance pattern is shown?
A.
B.
C.
D.
E.
Dominance
Incomplete dominane
Multiple alleles
Linkage
Crossing-over
11. Why are sex-linked disorders most
often observed in males?
A. The X chromosome only has genes for genetic
disorders
B. The Y chromosome cannot have genes that
cause genetic disorders
C. The Y chromosome can’t mask alleles on the x
chromosome
D. The x chromosome has genes only for sex
determination
11. Why are sex-linked disorders most
often observed in males?
A. The X chromosome only has genes for genetic
disorders
B. The Y chromosome cannot have genes that
cause genetic disorders
C. The Y chromosome can’t mask alleles on the x
chromosome
D. The x chromosome has genes only for sex
determination
12. What does it mean if someone is a
“carrier” of a disorder
A. The person passes on a disorder to another
individual through close contact/ exposure
B. The person does not have the disorder, but
will develop it later in life
C. The person does not have the disorder but
can pass it on to future generations
D. The allele is not passed on due to the Y
chromosome activation
12. What does it mean if someone is a
“carrier” of a disorder
A. The person passes on a disorder to another
individual through close contact/ exposure
B. The person does not have the disorder, but
will develop it later in life
C. The person does not have the disorder but
can pass it on to future generations
D. The allele is not passed on due to the Y
chromosome activation
13. Which term describes the pair of
alleles Dd?
A.
B.
C.
D.
E.
Phenotype
Diploid
Haploid
Homozygous
Heterozygous
13. Which term describes the pair of
alleles Dd?
A.
B.
C.
D.
E.
Phenotype
Diploid
Haploid
Homozygous
Heterozygous
14. Which of the following cells is a
diploid?
A.
B.
C.
D.
Egg Cell
Sperm Cell
Cheek cell
Gamete
14. Which of the following cells is a
diploid?
A.
B.
C.
D.
Egg Cell
Sperm Cell
Autosome
Gamete
15. What is a diploid cell?
A.
B.
C.
D.
Cell that has one copy of each chromosome
Cell that has two copies of each chromosome
Cell that has no chromosomes
None of the above
15. What is a diploid cell?
A. Cell that has one
copy of each
chromosome
B. Cell that has two
copies of each
chromosome
C. Cell that has no
chromosomes
D. None of the above
16. What is a haploid cell?
A.
B.
C.
D.
Cell that has one copy of each chromosome
Cell that has two copies of each chromosome
Cell that has no chromosomes
None of the above
16. What is a haploid cell?
A.
B.
C.
D.
Cell that has one copy of each chromosome
Cell that has two copies of each chromosome
Cell that has no chromosomes
None of the above
17. During metaphase 1 of meiosis…
A. Centromeres of replicated chromosomes line
up along the cell’s equator
B. Centromeres divide as sister chromatids
move toward opposite poles of the cell
C. Homologous chromosome pairs lineup along
the cell’s equator
D. Homologous chromosomes move toward
opposite poles of the cell
17. During metaphase 1 of meiosis…
A. Centromeres of replicated chromosomes line
up along the cell’s equator
B. Centromeres divide as sister chromatids
move toward opposite poles of the cell
C. Homologous chromosome pairs lineup along
the cell’s equator
D. Homologous chromosomes move toward
opposite poles of the cell
18. Nondisjuction can occur if
__________ chromosomes fail to
separate during meiosis I.
A. homologous
B. heterozygous
C. defective
D. Sex
E. Autosome
18. Nondisjuction can occur if
__________ chromosomes fail to
separate during meiosis I.
A. homologous
B. heterozygous
C. defective
D. Sex
E. Autosome
19. At the completion of meiosis II, there
are _______ __________daughter cells
A.
B.
C.
D.
2 haploid
4 haploid
2 diploid
4 diploid
19. At the completion of meiosis II, there
are _______ __________daughter cells
A.
B.
C.
D.
2 haploid
4 haploid
2 diploid
4 diploid
20. Why must crossing over occur?
A. It ensure that all cells underdoing meiosis
remain identical
B. It assembles the spindle fibers and centrioles
C. It is a source of genetic variation
D. It creates multiple alleles
20. Why must crossing over occur?
A. It ensure that all cells underdoing meiosis
remain identical
B. It assembles the spindle fibers and centrioles
C. It is a source of genetic variation
D. It creates multiple alleles
Pairs of homologous
chromosomes exchange
segments
21. Two heterozygous parents each has a
dominant allele for X brown eyes and a
recessive allele x for blue eyes. The
phenotypic ratio is brown:blue eyes in their
children is
A. 1:2:1
B. 3:1
C. 9:3:3:1
D. 1:3:1
21. Two heterozygous parents each has a
dominant allele for X brown eyes and a
recessive allele x for blue eyes. The
phenotypic ratio is brown:blue eyes in their
children is
A. 1:2:1
B. 3:1
C. 9:3:3:1
D. 1:3:1
22. In humans, meiosis occurs _____
A.
B.
C.
D.
Only in the reproductive organs
In all tissues
During growth and repair
All of the above
22. In humans, meiosis occurs _____
A.
B.
C.
D.
Only in the reproductive organs
In all tissues
During growth and repair
All of the above
23. Which of the above defines the
term codominance?
A. Any of the alternate forms of a gene may have in
a given gene pair or group
B. A heterozygous condition where both alleles are
expressed
C. A heterozgyous condition in which a pair of
alleles produces an intermediate blended
phenotype
D. The observable physical characteristics of an
organism
E. The combination of alleles resulting in a genetic
makeup
23. Which of the above defines the
term codominance?
A. Any of the alternate forms of a gene may have in
a given gene pair or group
B. A heterozygous condition where both alleles are
expressed
C. A heterozygous condition in which a pair of
alleles produces an intermediate blended
phenotype
D. The observable physical characteristics of an
organism
E. The combination of alleles resulting in a genetic
makeup