Chromosomes form tetrads during
Prophase I of meiosis
Anaphase II of meiosis
Interphase
Metaphase I of meiosis
The correct sequence of the steps in M phase of the cell cycle is
Cytokinesis Telophase Prophase Metaphase
Prophase Metaphase Anaphase Telophase
Prophase Metaphase Cytokinesis Telophase
Prophase Metaphase Telophase Anaphase
Which of the following occur in meiosis but not in mitosis?
Production of daughter cells
Chromosome replication
Growth of cells prior to division
Crossing over
If the liver cells of an animal have 24 chromosomes, how many chromosomes do its sperm cells have?
12
6
28
24
Which of the following is true of a species that has a chromosome number of 2n = 16?
The species is diploid with 32 chromosomes
None of these options are correct
The species is diploid with 16 chromosomes
A gamete from this species has 4 chromosomes
If the cell whose nuclear material is shown below continues toward completion of mitosis, which of the following events would occur next?
Spindle fiber formation
Synthesis of chromatids
Cell membrane synthesis
Formation of two new nucleii
Which of the following cells is in a haploid state?
Skin cells
Liver cells
Brain cells
Egg cells
Which of the following is the term for a human cell that contains 22 pairs of autosomes and two X chromosomes?
A female somatic cell
A sperm cell
An unfertilized egg cell
A male autosomal cell
The process of meiosis results in
Four genetically identical cells
Two genetically identical cells
Two genetically different cells
Four genetically different cells
What process occurs during Prophase I in meiosis that contributes to genetic variability?
Replication
Crossing over
Independent assortment
Mitosis
When comparing prophase I of meiosis with prophase of mitosis, which of the following occurs on in meiosis?
The nuclear envelope disappears
Spindle fibers form
The chromosomes condense
Tetrads form
During Metaphase II...
Homologous chromosomes line up in the middle of the cell
Crossing over occurs
Sister chromatids line up in the middle of the cell
Sister chromatids separate
What is a karyotype?
A set of physical characteristics that define a person
A display of every pair of homologous chromosomes in a cell
A collection of all the mutations in a genome
A system of classifying cell nuclei
If cells in the process of dividing are exposed to a drug that interferes with the ability of the spindle fibers to bind to the chromosomes, at which stage will mitosis be stopped?
Prophase
Metaphase
Telophase
Anaphase
The picture shows which phase of the cell cycle?
S
G1
M phase
G2
After telophase I of meiosis, the chromosomal makeup of each daughter cell is
diploid, the chromosomes are composed of 2 chromatids
haploid, the chromosomes are composed of 2 chromatids
haploid, the chromosomes are composed of a single chromatid
diploid, the chromosomes are composed of a single chromatid
In animals, somatic cells are produced by mitosis and _______ are produced by meiosis
Gametes
Spores
Clones
Diploid cells
Which of the following is true of the process of meiosis?
Four haploid cells result
Four diploid cells result
Two diploid cells result
Four somatic cells result
Mitosis and meiosis are both processes involved in cellular reproduction. Which of the following describes an event that results from mitosis but not meiosis?
Replication of genetic material
The cell goes through two stages of cell division
Daughter cells that are identical to the parent cell
Four daughter cells are produced from each parent cell
In which phase of meiosis are tetrads of chromosomes aligned at the center of the cell and independent assortment occurs?
Prophase I
Metaphase I
Anaphase I
Metaphase II
Through a microscope, you can see a cell plate beginning to develop across the middle of the cell and nuclei reforming on either side of the cell plate. The cell is most likely
A plant cell in the S phase of the cell cycle
An animal cell in the S phase of the cell cycle
A plant cell in the process of cytokinesis
An animal cell in the process of cytokinesis
Prior to cell division, each chromosome replicates or duplicates its genetic material. The products are connected by a centromere and are called:
Sister chromosomes
Sister chromatids
Sex chromosomes
Sex chromatids
A group of cells is tested for DNA content immediately following mitosis and is found to have an average of 8mg of DNA per nucleus. Those cells would have _____ mg at the end of S phase and _____ mg at the end of G2.
16 mg, 8 mg
8 mg, 8 mg
8 mg, 16 mg
16 mg, 16 mg
During which stage of mitosis do nucleii reappear?
Telophase
Anaphase
Prophase
Metaphase
Which of the following phases of cell division is different for animal and plant cells?
Cytokinesis
Metaphase
Interphase
Anaphase
Imagine looking through a microscope at a squashed onion root tip. In some cells, replicated chromosomes are aligned along the center of the cell. The particular cells are in which stage of mitosis?
Telophase
Metaphase
Anaphase
Prophase
Homologous chromosomes separate during what phase?
Telophase II
Anaphase II
Anaphase I
Telophase I
Unlike mitosis, meiosis results from the formation of
Diploid cells
Body cells
2n daughter cells
Haploid cells
The human X and Y chromosomes are:
Called "sex chromosomes" because they determine sex
Both are present in every somatic cell in males and females
All of the listed answers are correct
Approximately the same size
The process of reduction division in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell is known as...
Interphase
Mitosis
Meiosis
Cytokinesis
Which of the following statements about crossing over is incorrect?
It leads to increase in genetic diversity
It combines sections of paternal & maternal chromosomes
It occurs during prophase I of meiosis
It plays a role in meiosis and mitosis
Which of the following is NOT correct?
All somatic cells are produced by mitosis
Cytokinesis is a part of mitosis
Mitosis produces genetically identical cells
Metaphase occurs before anaphase
Which of the following happens at the conclusion of meiosis I?
Sister chromatids are separated
The chromosome number is conserved
Homologous chromosomes are separated
Four daughter cells are formed
If a diploid cell containing 46 chromosomes undergoes meiosis, how many chromosomes will each daughter cell have?
23
12
96
24
The picture shows which phase of mitosis?
Metaphase
Anaphase
Interphase
Telophase
Homologous chromosomes are defined as
Chromosomes in which all sets come from each grandparent
Chromosomes in which all sets come from the male
Chromosomes in which all sets come from the female
Chromosomes in which a set comes from each parent
In which phase of meiosis does crossing over occur?
Anaphase I
Metaphase II
Prophase II
Prophase I