Part 2 - Final Examination
Quiz by Ailynn Vel Rayos
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- Q1
Which of the following is true of mitosis?
Both
The chromosome number of the resulting cells is the same as that of the parent cell.
DNA replication is completed prior to the beginning of this phase.
60s - Q2
Which of the following is true of meiosis?
The homologs do not pair during prophase I.
The chromosome number in the resulting cells is halved.
The chromosome number of the resulting cells is the same as that of the parent cell.
DNA replication occurs before meiosis I and meiosis II.
60s - Q3
Which of the following is true of kinetochores on mitotic chromosomes?
They are located at the centromere of each chromosome.
All of the above
They are the sites where microtubules attach to separate the chromosomes.
They are organized so that there is one per sister chromatid.
60s - Q4
Which of the following is true of the mitotic spindle?
It is composed of kinetochores at the metaphase plate.
It originates only at the centrioles in the centrosomes.
It is composed of actin and myosin microfilaments.
It is composed of microtubules, which help separate the chromosomes to opposite poles of the cell.
60s - Q5
Imagine that there is a mutation in the Cdk2 gene such that its gene product is nonfunctional. What kind of effect would this mutation have on a mature red blood cell?
The cell would not be able to enter G1.
The cell would be unable to reproduce itself.
There would be no effect, because mature red blood cells do not enter the cell cycle.
The cell would be unable to replicate its DNA.
60s - Q6
Imagine that there is a mutation in the Cdk2 gene such that its gene product is nonfunctional. What kind of effect would this mutation have on a mammalian white blood cell?
The cell would be unable to enter G1.
The cell would be unable to replicate its DNA.
Both
60s - Q7
Which of the following is true of chromatids?
They are identical in meiotic chromosomes.
Both
They are replicated chromosomes still joined together at the centromere
60s - Q8
Chromosome movement during anaphase is the result of
shortening of the microtubules at the centrosome that pull the chromosomes toward the poles.
both
the molecular motors at the kinetochores that move the chromosomes toward the poles.
both
60s - Q9
The difference between asexual and sexual reproduction is
asexual reproduction only occurs in bacteria, and sexual reproduction occurs in plants and animals.
asexual reproduction results from the fusion of two gametes; sexual reproduction produces clones of the parent organism.
asexual reproduction only occurs in haplontic organisms, and sexual reproduction occurs only in diplontic organisms
asexual reproduction results in an organism that is identical to the parent, whereas sexual reproduction results in an organism that is not identical to either parent.
60s - Q10
A chromatid is
one half of a newly replicated eukaryotic chromosome.
one of the pairs of homologous chromosomes.
one of the pairs of homologous chromosomes.
one of the pairs of homologous chromosomes.
60s - Q11
In the beginning of Chapter 10, hemophilia is mentioned as a trait carried by the mother and passed to her sons. What is the pattern of inheritance for this trait?
Hemophilia is an allele carried on one of the mother's autosomal chromosomes.
Hemophilia is an allele carried on one of the mother's autosomal chromosomes.
Hemophilia is carried on the X chromosome and can only be inherited by the son if the mother is a carrier.
Hemophilia is an allele carried on one of the mother's autosomal chromosomes.
60s - Q12
Hemophilia is an allele carried on one of the mother's autosomal chromosomes.
Codominance
Pleiotropism
Polygenic inheritance
Incomplete dominance
60s - Q13
True-breeding plants
result from crossing over during prophase I of meiosis.
result from a monohybrid cross.
produce the same offspring when crossed for many generations.
result from a dihybrid cross.
60s - Q14
What is the probability that a cross between a true-breeding pea plant with spherical seeds and a true-breeding pea plant with wrinkled seeds will produce F1 progeny with spherical seeds?
0
1
1/2
1/4
60s - Q15
What is the pattern of inheritance for a rare recessive allele?
Unaffected parents can produce children who are affected.
None of the these
Unaffected mothers have affected sons and daughters who are carriers.
Every affected person has an affected parent.
60s