WorksheetsMeiosis Practice AP Bio
Total questions: 50
Worksheet time: 54mins
Reorder the phases of mitosis
Prophase
Metaphase
Anaphase
Telophase
Nuclear envelope disappears; spindle fibers begin to form; chromatin condenses into chromosomes
Chromosomes line up in the middle of the cell
Sister chromatids are pulled away from each other
Nuclear envelope begins to form; spindle fibers fall apart; chromosomes relax into chromatin
Which of the following does NOT accurately describe homologous pairs of chromosomes?
Homologous chromosomes code for the same genes.
Homologous pairs contain one chromosome inherited from the father and one from the mother.
Homologous pairs contain one original chromosome and one replicated copy.
Human cells contain 23 pairs of homologous chromosomes.
State the ploidy level and the number of chromosomes shown in the figure.
n=8
2n=8
n=16
2n=16
If a diploid cell contains 10 chromosomes, choose the correct ploidy level and the number of chromosomes in the cell after;
Mitosis: 2n=20
Meiosis: n=10
Mitosis: 2n=10
Meiosis: n=5
Mitosis: n=20
Meiosis: 2n=10
Mitosis: n=10
Meiosis: 2n=5
Which of Mendel's laws states that alleles are distributed to gametes independent of one another?
Law of Dominance
Law of Segregation
Law of Independent Assortment
Which of Mendel's laws states that alleles are separated during meiosis?
Law of Dominance
Law of Segregation
Law of Independent Assortment
Which of the following best explains why meiosis results in greater genetic diversity than mitosis?
After meiosis, daughter cells are diploid and have twice as much genetic material, which can be divided in many more possible combinations.
After meiosis, haploid daughter cells are fertilized, which doubles their number of chromosomes and increases the number of possible genes.
During meiosis, chromosomes assort themselves independently of each other, which allows for more different possible combinations of chromosomes.
During meiosis, more daughter cells are produced, which increases the likelihood that fertilization will occur.
This diagram shows a diploid cell with two pairs of homologous chromosomes.
Due to independent assortment, what is the possible genetic make-up of gametes produced by this organism?
SsTt
Ss, Tt
S, s, T, t
ST, St, sT, st
Match the correct statements with the corresponding type of cell division.
Mitosis is defined as
the division of the replicated contents of the nucleus of somatic cells
Meiosis
type of cell?
Haploid Cells
Mitosis
type of cell?
diploid cells
Meiosis
End result
4 different daughters' cells
Mitosis
End result
2 identical daughters' cells
State the phase and the chromosomal event shown in the figure.
Prophase: no synapsis and crossing over between non-sister chromatids
Prophase I: synapsis and crossing over occurs between non-sister chromatids
Prophase II: no synapsis and crossing over between non-sister chromatids
Prophase II: synapsis and crossing over occurs between non-sister chromatids
State the phase and the chromosomal number shown in the figure.
Prophase, n=6
Prophase, 2n=6
Prophase I, n=6
Prophase I, 2n=6
Prophase II, n=6
A diploid cell has 6 chromosomes. Determine the phase and chromosomal behaviour of the cell as shown in the figure.
Metaphase: chromosomes align at metaphase plate
Metaphase I: Homologous chromosomes align at metaphase plate
Metaphase II: Chromosomes align at metaphase plate
Metaphase II: Homologous chromosomes align at metaphase plate
State the phase and the chromosomal behaviour shown in the figure.
Anaphase: Sister chromatids separate & move to the opposite poles
Anaphase: Homologous chromosomes separate & move to the opposite poles
Anaphase I: Sister chromatids separate & move to the opposite poles
Anaphase I: Homologous chromosomes separate & move to the opposite poles
Anaphase II: Sister chromatids separate & move to the opposite pol
Name the phase shown in the figure. What is the ploidy level and chromosomal number in each cell at the end of this phase?
Telophase. n=3
Telophase. 2n=6
Telophase I. n=3
Telophase I. 2n=6
Telophase II. n=3
Cells and the organisms they make up reproduce through cell division. Some organisms reproduce through mitosis, while others reproduce through meiosis and fertilization. What advantage does meiosis give to organisms that reproduce sexually?
Meiosis ensures that offspring inherit genes from their parents.
Meiosis ensures that offspring will not inherit any genetic disorders.
Meiosis ensures that offspring are genetically different from their parents.
Meiosis ensures that offspring will have identical phenotypes to their parents.
Some organisms are able to reproduce asexually through mitosis, while cells of organisms that reproduce sexually will undergo meiosis to produce gametes. Which process do you predict would be most beneficial to a species during drastic change in environmental conditions?
Meiosis; it results in more daughter cells, which increases the population of the species.
Meiosis; it results in more genetic variation, which would help ensure the species will survive.
Mitosis; it results in more genetic mutations, which may be advantageous to the species.
Mitosis; it results in more offspring in a short time, which increases the odds that some will survive.
Asexual division
Cell division for growth and repair
Results in two identical daughter cells
Occurs in somatic cells
Consists of prophase, metaphase, anaphase, and telophase
Chromosomes line up in the center of the cell during metaphase
Reduction division
Results in two haploid daughter cells
Consists of prophase I, metaphase I, anaphase I, and telophase I
Crossing over occurs during prophase I
Homologus chromosomes are separated during Anaphase I
Results in four haploid daughter cells
Occurs in reproductive cells
Consists of prophase II, metaphase II, anaphase II, and telophase II
Sister Chromatids are separated during Anaphase II
Similar to mitosis
Sexual division
Creates Gametes
Independant assortment occurs to ensure random assortment of parental chromosomes
Reorder the following
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Label the images.
Metaphase
Prophase
Anaphase
Cytokinesis
Interphase
Telophase
Label the following terms: Cell, DNA, Chromosome, Nucleus, Gene
Gene
DNA
Chromosome
Nucleus
Cell
How does metaphase in meiosis I differ from metaphase in mitosis?
In mitosis, single chromosomes are pulled apart at the centromere, while in meiosis I, homologous pairs of chromosomes are pulled apart from one another.
In mitosis, homologous pairs of chromosomes are pulled apart from one another, while in meiosis I, single chromosomes are pulled apart at the centromere.
In mitosis, homologous chromosomes are pulled apart at the centromeres, while in meiosis I, single chromosomes pair up before being pulled apart.
In mitosis, single chromosomes pair up before being pulled apart, while in meiosis I, homologous chromosomes are pulled apart at the centromeres.
What phase of meiosis is labeled G?
Anaphase II
Prophase II
Metaphase II
Telophase II
Telophase I
What phase of meiosis is labeled F?
Anaphase II
Prophase II
Metaphase II
Telophase II
Telophase I
What phase of meiosis is labeled E?
Anaphase II
Prophase II
Metaphase II
Telophase II
Telophase I
What phase of meiosis is labeled D? (This is the 1st phase of Meiosis II)
Anaphase II
Prophase II
Metaphase II
Telophase II
Telophase I
What is the last phase of the 1st division of meiosis? This is the stage where the cell membrane pinches in and two cells start to form from the one original cell.
Anaphase II
Prophase II
Metaphase II
Telophase II
Telophase I
What phase of meiosis is labeled A?
Anaphase I
Prophase I
Metaphase I
Telophase II
Telophase I
What phase of meiosis is labeled B?
Anaphase I
Prophase I
Metaphase I
Telophase II
Telophase I
What phase of meiosis is labeled C?
Anaphase I
Prophase I
Metaphase I
Telophase II
Telophase I
In which phase of meiosis does crossing-over occur?
Anaphase I
Prophase I
Metaphase I
Telophase II
Telophase I
In which phase of meiosis are sister chromatids or chromosomes lining up at the equator?
Anaphase I
Prophase I
Metaphase I
Metaphase II
Telophase I
In which phase of meiosis are homologous chromosomes being pulled to the poles?
Anaphase I
Prophase I
Metaphase I
Telophase II
Telophase I
In which phase of meiosis are homologous chromosomes lining up at the equator?
Anaphase I
Prophase I
Metaphase I
Telophase II
Telophase I
In what phase of meiosis does the following occur?
Chromosomes are segregated at opposite poles, one group on each side of the cell. Each chromosome consists of two chromatids. (sister chromatids) Cytokinesis begins, forming two daughter cells.
Prophase I
Anaphase I
Metaphase I
Telophase I
Prophase II
In what phase of meiosis does the following occur?
Homologous chromosomes separate and are pulled to opposite sides of the cell by spindle fibers. The sister chromatids of each chromosome remain attached.
Prophase I
Anaphase I
Metaphase I
Telophase I
Prophase II
In what phase of meiosis does the following occur?
Chromosomes are pulled by spindle fibers to the mid-line of the cell. Each chromosome is paired with its homologue.
Prophase I
Anaphase I
Metaphase I
Telophase I
Prophase II
In what phase of meiosis does the following occur?
Chromosomes are condensed, such that they are visible in the cell. Synapsis (crossing over) occurs; homologous chromosomes pair up. The nuclear membrane dissolves.
Prophase I
Anaphase I
Metaphase I
Telophase I
Prophase II
In what phase of meiosis does the following occur?
Chromosomes become attached to spindle fibers. Each cell contains one chromosome(sister chromatid) of each type; there are no homologous pairs. 1st phase of Meiosis II
Prophase I
Anaphase I
Metaphase I
Telophase I
Prophase II
In what phase of meiosis does the following occur?
Spindle fibers align the chromosomes (sister chromatids) at the mid-line, or equator, of the cell. The chromosomes are not in pairs.
Prophase I
Anaphase II
Metaphase II
Telophase II
Prophase II
In what phase of meiosis does the following occur?
By the end of meiosis, 4 haploid cells are formed. Each cell has a unique genetic make-up. A nucleus surrounds each set of chromosomes, and the cell carries out normal metabolic activities.
Prophase I
Anaphase II
Metaphase II
Telophase II
Prophase II
In what phase of meiosis does the following occur?
Chromatids (sister chromatids) of the chromosomes separate and are pulled to opposite sides of the cell by spindle fibers.
Prophase I
Anaphase II
Metaphase II
Telophase II
Prophase II
A fertilized egg is also known as a(n)
(a)
What is the process in which two gametes will fuse together to form genetically different offspring?
(a)
Which of the following best describes the difference between meiosis I and meiosis II?
Meiosis I is responsible for creating four genetically unique cells and meiosis II is responsible for creating four cells that are genetically different from the parent cell.
Meiosis I is responsible for creating four genetically unique cells and meiosis II is responsible for creating two cells that are genetically different from the parent cell.
Meiosis I is responsible for creating two cells that are genetically different from the parent cell and meiosis II is responsible for creating four cells that are genetically identical to the parent cell.
Meiosis I is responsible for creating two cells that are genetically different from the parent cell and meiosis II is responsible for creating four genetically unique cells.
Describe the process of nondisjunction.
Homologous chromosomes exchange genetic information
The alignment of the chromosomes on the metaphase plate
Homologous chromosomes or sister chromatids remain attached during anaphase
The process of sperm and egg fusing to create a zygote
