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BIology Test October- Meiosis and Inheritance

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
Through meiosis
a.
alternate forms of genes are shuffled.
b.
parental DNA is divided and distributed to forming gametes.
c.
the diploid chromosome number is reduced to haploid.
d.
offspring are provided with new gene combinations.
e.
all of these
 

 2. 
If a parent cell has 16 chromosomes and undergoes meiosis, the resulting cells will have how many chromosomes?
a.
64
b.
32
c.
16
d.
8
e.
4
 

 3. 
Homologous chromosomes
a.
may exchange parts during meiosis.
b.
have alleles for the same characteristics even though the gene expression may not be
      the same.
c.
are in pairs, one chromosome of each pair from the father and one from the mother.
d.
pair up during meiosis.
e.
all of these
 

 4. 
Copies of chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?
a.
mother
b.
daughter
c.
sister
d.
homologous
e.
none of these
 

 5. 
Meiosis typically results in the production of
a.
2 diploid cells.
b.
4 diploid cells.
c.
4 haploid cells.
d.
2 haploid cells.
e.
1 triploid cell.
 

 6. 
A locus is
a.
a recessive gene.
b.
an unmatched allele.
c.
a sex chromosome.
d.
the location of an allele on a chromosome.
e.
a dominant gene.
 

 7. 
Diploid organisms
a.
have corresponding alleles on homologous chromosomes.
b.
are usually the result of the fusion of two haploid gametes.
c.
have two sets of chromosomes.
d.
have pairs of homologous chromosomes.
e.
all of these
 

 8. 
If R is dominant to r, the offspring of the cross of RR with rr will
a.
be homozygous.
b.
display the same phenotype as the RR parent.
c.
display the same phenotype as the rr parent.
d.
have the same genotype as the RR parent.
e.
have the same genotype as the rr parent.
 

 9. 
The F2 phenotypic ratio of a monohybrid cross is
a.
1:1.
b.
2:1.
c.
9:3:3:1.
d.
1:2:1.
e.
3:1.
 

 10. 
If all offspring of a cross have the genotype Aa, the parents of the crosses would most likely be
a.
AA x aa.
b.
Aa x Aa.
c.
Aa x aa.
d.
AA x Aa.
e.
none of these
 

 11. 
Some dogs have erect ears; others have drooping ears. Some dogs bark when following a scent; others are silent. Erect ears and barking are due to dominant alleles located on different chromosomes. A dog homozygous for both dominant traits is mated to a droopy-eared, silent follower. The phenotypic ratio expected in the F1 generation is
a.
9:3:3:1.
b.
100 percent of one phenotype.
c.
1:1.
d.
1:2:1.
e.
none of these
 

 12. 
Individuals with the genotype Gg Hh Ii Jj will produce how many different kinds of gametes?
a.
2
b.
4
c.
6
d.
8
e.
16
 

 13. 
In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). If a red male was crossed with a black female to produce a red spotted puppy, the genotypes of the parents (with male genotype first) would be
a.
Bb Ss x Bb Ss.
b.
bb Ss x Bb Ss.
c.
bb ss x Bb Ss.
d.
bb Ss x Bb ss.
e.
Bb ss x Bb ss.
 

 14. 
In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s). A cross of Bb Ss with bb ss would produce the phenotypic ratio
a.
9:3:3:1.
b.
1:1:1:1.
c.
1:2:1.
d.
3:1.
e.
none of these
 

 15. 
An incompletely dominant gene controls the color of chickens so that BB produces black, Bb produces a slate-gray color called blue, and bb produces splashed white. A second gene controls comb shape, with the dominant gene R producing a rose comb and r producing a single comb. If a pure-breeding black chicken with a rose comb is mated to a splashed white chicken with a single comb in the F2 generation, what fraction of the offspring will be black with rose comb?
a.
9/16
b.
3/8
c.
3/16
d.
1/8
e.
1/16
 

 16. 
If red (RR) is crossed with white (rr) and produces a pink flower (Rr), and tall (D) is dominant to dwarf (d), the F2 phenotypic ratio from a cross of RR dd with rr DD would be
a.
9:3:3:1.
b.
1:1:1:1.
c.
1:2:2:4:1:2:1:2:1.
d.
3:6:3:1:2:1.
e.
none of these
 

 17. 
Susan, a mother with type B blood, has a child with type O blood. She claims that Craig, who has type A blood, is the father. He claims that he cannot possibly be the father. Further blood tests ordered by the judge reveal that Craig is AA. The judge rules that
a.
Susan is right and Craig must pay child support.
b.
Craig is right and doesn't have to pay child support.
c.
Susan cannot be the real mother of the child; there must have been an error made at the hospital.
d.
it is impossible to reach a decision based on the limited data available.
e.
none of these
 

 18. 
Multiple effects of a single gene is known as
a.
expressivity.
b.
penetrance.
c.
codominance.
d.
pleiotropy.
e.
multiple alleles.
 

 19. 
All of the genes located on a given chromosome comprise a
a.
karyotype.
b.
bridging cross.
c.
wild-type allele.
d.
linkage group.
e.
none of these
 

 20. 
If the paternal chromosome has alleles L, M, and n and the maternal chromosomes have l, m, and N, then the chromosome that cannot be produced by crossing over is
a.
LMN
b.
LMn
c.
LmN
d.
Lmn
e.
lmn
 

 21. 
Red-green colorblindness is an X-linked recessive trait in humans. A colorblind woman and a man with normal vision have a son. What is the probability that the son is colorblind?
a.
100 percent
b.
75 percent
c.
50 percent
d.
25 percent
e.
0 percent
 

 22. 
If a daughter expresses an X-linked recessive gene, she inherited the trait from
a.
her mother.
b.
her father.
c.
both parents.
d.
neither parent.
e.
her grandmother.
 

 23. 
An X-linked carrier is a
a.
homozygous dominant female.
b.
heterozygous female.
c.
homozygous recessive female.
d.
homozygous male.
e.
heterozygous male.
 

 24. 
A chromosome's gene sequence that was ABCDEFG before modification and ABCDLMNOP afterward is an example of
a.
inversion.
b.
deletion.
c.
duplication.
d.
translocation.
e.
crossing over.
 

 25. 
A chromosome's gene sequence that was ABCDEFG before damage and ABFEDCG after is an example of
a.
inversion.
b.
deletion.
c.
duplication.
d.
translocation.
e.
crossing over.
 

 26. 
The condition occurring when an organism has a 2n + 1 chromosome composition is known as
a.
monosomy.
b.
trisomy.
c.
diploid.
d.
haploid.
e.
both trisomy and haploid.
 

 27. 
Suppose a hemophilic male (X-linked recessive allele) and a female carrier for the hemophilic trait have a nonhemophilic daughter with Turner syndrome. Nondisjunction could have occurred in
a.
both parents.
b.
neither parent.
c.
the father only.
d.
the mother only.
e.
none of these
 
 
The following graph tracks the amount of DNA in a single nucleus through the process of meiosis.  Answer the questions based on the graph.
nar001-1.jpg
 

 28. 
Which of the following statements is false?
a.
Tetrads form during IV.
b.
Cells are diploid during IV.
c.
Cells are diploid during XII.
d.
DNA is replicated once during this process.
e.
The cell divides twice during this process.
 
 
The following pedigree shows the inheritance of an autosomal genetic disorder inherited in simple Mendelian patterns.
nar002-1.jpg
 

 29. 
Determine if the genetic disorder is dominant or recessive.  Which individual can possibly be a NON-carrier of the allele causing the disorder.
a.
III
b.
V
c.
IX
d.
X
e.
All individuals above must have at least one copy of the affected allele.
 
 
The following pedigree shows the inheritance of an X-linked recessive disorder.
nar003-1.jpg
 

 30. 
Which individual does not have the recessive allele?
a.
I
b.
IV
c.
V
d.
IX
e.
Both V and IX.
 



 
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