WorksheetsMitosis and Meiosis
Total questions: 25
Worksheet time: 25mins
A diploid cell has ____ the number chromosomes as a haploid cell.
half
twice
one-fourth
four times
An organism’s traits are determined by the specific combination of inherited _____.
cells
genes
proteins
chromatids
Identical copies of chromatin held together by cohesin at the centromere are called _____.
histones
nucleosome
chromatin
sister chromatids
Chromosomes are duplicated during what stage of the cell cycle?
G1 Phase
S Phase
Prophase
Prometaphase
Which of the following events does not occur during some stages of interphase?
DNA duplication
organelle duplication
increase in cell size
separation of sister chromatids
The mitotic spindles arise from which cell structure?
centromere
centrosome
kinetochore
cleavage furrow
Attachment of the mitotic spindle fibers to the kinetochores is a characteristic of which stage of mitosis?
prophase
prometaphase
metaphase
anaphase
Unpacking of chromosomes and the formation of a new nuclear envelope is a characteristic of which stage of mitosis?
prometaphase
metaphase
anaphase
telophase
Separation of the sister chromatids is a characteristic of which stage of mitosis?
prometaphase
metaphase
anaphase
telophase
Which of the following is the correct order of events in mitosis?
Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the mitotic spindle. The nucleus reforms and the cell divides. Cohesin proteins break down and the sister chromatids separate.
The kinetochore becomes attached to the mitotic spindle. Cohesin proteins break down and the sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus reforms and the cell divides.
The kinetochore becomes attached to the cohesin proteins. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides.
The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. Cohesin proteins break down and the sister chromatids separate. The nucleus reforms and the cell divides.
(a) is one of the two identical strands of DNA that make up a chromosome
What happen in anaphase?
Chromosomes begin to condense
Chromosomes are lined up on the metaphase
Spindle fibers then shrink and shorten to pull the chromatid towards the opposite poles
Plasma membrane cleaves at the middle of the cell between two nuclei
After cytokinesis in plant cell, (a) are produced by the cells to strengthen the new cell walls
Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?
In order for the genetic information to be transferred into daughter cells
In order for the DNA to be contained in the nucleus
In order for the cell to be able to increase in size
In order for the cell to re-order the DNA sequencing in the new cells
Which of the following events does not occur during some stages of interphase?
DNA duplication
organelle duplication
increase in cell size
separation of sister chromatids
What happens during synthesis?
DNA is replicated in the nucleus resulting in two identical copies of DNA.
Cells just function as they should.
DNA is replicated in the cytoplasm resulting in two different copies of DNA.
Cells are duplicated.
Homologous chromosomes are
Identical chromosomes
Found only in mitosis
Similar in size and shape but are not identic
Completely different chromosomes
What is the product of meiosis?
2 identical cells
2 genetically different cells
4 identical cells
4 genetically different cells
Haploid cells have
half the number of chromosomes of a starting cell
a full number of chromosomes like the organism's body cells
If an organism has 50 chromosomes in its body cells, how many chromosomes would be in each cell at the end of meiosis?
20
25
50
100
Which of the following occurs during prophase I of meiosis?
Separation of sister chromatids
Synapsis and crossing over
Alignment of chromosomes at the metaphase plate
Formation of the nuclear envelope
What is the purpose of crossing over during meiosis?
To reduce the chromosome number by half
To create genetic diversity
To separate homologous chromosomes
To form sister chromatids
During which phase of meiosis do homologous chromosomes pair up and align along the equatorial plate?
Metaphase I
Metaphase II
Prophase I
Anaphase I
A species has a diploid number of 10. If one of its cells undergoes meiosis and all events proceed normally, how many chromosomes and chromatids will be present in each daughter cell at the end of meiosis I?
10 chromosomes and 10 chromatids
5 chromosomes and 10 chromatids
10 chromosomes and 20 chromatids
5 chromosomes and 5 chromatids
