3.4 Asexual and Sexual Reproduction Question Set
After mitosis, two daughter cells together have 96 chromosomes. How many chromosomes did the parent cell have?
48
A unicorn parent cell has 88 chromosomes. How many will each daughter cell have after two rounds of mitosis?
88
The egg cell of a unicorn contains 44 chromosomes. How many chromosomes does a skin cell of a unicorn have?
88
Which of the following is NOT an advantage of asexual reproduction? A. greater genetic variation B. rapid reproduction C. requires little energy D. less opportunity for mutation
A. greater genetic variation
Place the following steps in the correct order: 1. Sperm nuclear envelope breaks down 2. Genomes blend to form a diploid cell 3. Decondensation occurs 4. Sperm head penetrates egg cytoplasm
4. Sperm head penetrates egg cytoplasm 1. Sperm nuclear envelope breaks down 3. Decondensation occurs 2. Genomes blend to form a diploid cell
The skin cell of a unicorn contains 88 chromosomes. How many chromosomes does a sperm cell of a unicorn have?
44
If a karyotype shows 39 chromosomes for an organism, what conclusion can be drawn?
Nondisjunction has occurred.
If following meiosis II, one daughter cell is monosomic and the other is trisomic, then why does an aneuploid offspring not show a mixture of monosomy and trisomy?
Only one daughter cell from each parent contributes to the offspring.
Karen has 47 chromosomes but no apparent abnormalities. What is true about Karen?
She has aneuploidy.
Which of the following is the simplest form of sexual reproduction?
conjugation
Mitosis results in
diploid cells
The fusion of sperm and egg is
fertilization
What is produced at the end of meiosis?
four haploid cells
What cells are haploid?
gametes
Evolution favors sexual reproduction because ________.
it contributes to genetic diversity
If nondisjunction occurs, then the cell has gone through
meiosis I or II
Monosomy and trisomy are
mutations forms of aneuploidy
The purpose of meiosis is to generate ________.
sex cells
During which phase of meiosis are the haploid cells formed?
telophase II
What is a result of non-disjunction?
trisomy
During mitosis, in order to generate a haploid cell, a parent cell must undergo ________.
two anaphases
Which of the following is true? A. A mitotic parent cell must be a diploid. B. A meiototic parent cell must be a diploid. C. A meiotic parent cell must be aneuploidy. D. A meiotic parent cell must be haploid.
D. A meiotic parent cell must be haploid.
Which of the following is one way that meiosis II is more similar to mitosis than meiosis I? A. DNA replication occurs before mitosis and meiosis I. B. Haploid cells are produced from mitosis and meiosis II. C. Homologous chromosomes cross over in mitosis and meiosis I. D. Sister chromatids separate in mitosis and meiosis II.
D. Sister chromatids separate in mitosis and meiosis II.
What is needed before meiosis can begin?
DNA replication
Why does crossing over only occur in meiosis I?
Homologous chromosomes are only together in meiosis I.
Why is there no homologous chromosome pairing in mitosis?
Homologous chromosomes go to both daughter cells in mitosis.
A cell undergoes meiosis and is still a diploid cell. What conclusion can most likely be drawn about the cell?
It has only undergone meiosis I
A researcher tries everything he can, but cannot get a certain cell to undergo mitosis. What must be wrong with the cell?
It is a gamete.
A parent cell acquires a mutation during DNA replication. How will the daughter cells be affected after mitosis?
They will also have the mutation.
Are homologous chromosomes different from sister chromatids? Explain.
Yes; sister chromatids are identical before meiosis l, but homologous chromosomes come from each parent.
Your friend tells you that the number of chromosomes in a somatic cell of a carp fish is 105. What conclusion can you draw from this information?
Your friend is wrong because diploid cells always have an even number of chromosomes.
Some organisms undergo parthenogenesis in which an offspring grows from an egg that is uncombined with a sperm. How can parthenogenesis be categorized?
a form of asexual reproduction
At the end of meiosis I, one daughter cell holds all of the homologous chromosomes and the other has none. In which phase did an error occur?
anaphase I
