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Wize University Biology Textbook > The Cell Cycle

The Cell Cycle

2 Activities

Wize University Biology Textbook > The Cell Cycle

The Genome & Chromosomal Structure

2 Activities

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Consider a wheat variety with a karyotype n=5 and 4n= 20.
What ploidy is this wheat variety?


How many different alleles of a gene can you find in an individual of this wheat?


How many different alleles of a gene can you find in the whole species of this wheat variety?


How are new alleles generated?


How many double helices would you find in a cell of this wheat variety if that cell was in G1 phase?


More The Cell Cycle Questions:
Complete the following table:
In which of the following phases is DNA replicated?
For G1 phase, the checkpoint requires that
For G2 phase, the checkpoint requires that
Phase
DNA is replicated during _______ phase
Cells prepare for division in the ___ phase
In which phase do chromosomes become fully condensed?
What are the two major phases of the cell cycle?
Which of the following can be found in diploid cells in G1 phase?
Cats are 2n=382n=38. A somatic cat cell stuck in G2 phase would have how many chromatids?
DNA replication in S phase can be observed using nucleotides that have been tagged with a radioactive or fluorescent label. Why would you need to be careful when choosing which nucleotide to label?
Practice: Cell Cycle
Draw a somatic cell that is n=5 in G1 phase and G2 phase.
If a cell contained 4 chromosomes during prophase, how many chromosomes and chromatids would it have during prometaphase?
How can FACs be used to quantify the amount of cells in different phases of the cell cycle?
A fluorescent dye that binds to DNA is added to a population of proliferating cells. The amount of fluorescence is directly proportional to the amount of DNA found in each cell. The following graph is generated:
Indicate on the graph where cells in each phase of the cell cycle (G1,S,G2,M)(G_1,S,G_2,M) are represented
Which of the following statements are CORRECT?
1. Mitotic events can be observed with a light microscope
2. Sister chromatids are generated during prophase
Practice: Mitosis
Complete the following table based on a cell that is 2n=12
Practice: Cell Cycle 2
A cell is 2n=82n=8and has the genotype a2/a2, b1/b2, c1/c2, d2/d2. Draw the cell:
a) in "G1 phase"
b) At "metaphase"
Practice: Genome 2
A diploid cell that is 2n = 4 receives a2, b2, and c2 alleles from one parent, and a1, b2, and c2 alleles from the other parent. Alleles a and b are on the same chromosome, while allele c is on another one. Draw the resulting cell after DNA replication (after S phase).
Practice: Genome 1
A haploid cell has the genetic formula n=8n=8. Draw how the cell would look after DNA replication (after S phase).
C-values
A somatic cell in G2 of the cell cycle has a c-value of 20pg.
What is the content in pg of the same cell in G1 phase of the cell cycle?
What is the c-value in pg of the species that this cell came from?
Capsella bursa-pastoria and Capsella grandiflora are two very closely related species. Flow cytometry analysis shows that somatic cells in G1 phase of C. bursa-pastoria cells contain a 0.80 pg of DNA, while C. grandiflora has 0.44 pg.
What does this suggest about the ploidy of these two species?
What would the C-value of these two species be?
Cell cycle
In order, what are the phases of the Mitotic (M) phase of the cell cycle?
Cell cycle
In order, what are the phases of of interphase?
If you were to look at a dividing somatic cell in prometaphase under a microscope, what structures could you see clearly given that you would be able to see all structures of the cell without an appropriate stain?
i. Condensed chrosmosomes
ii. A single centrosome
A cell that contains 24 sister chromatids in prophase would contain how many chromosomes at G1 of the next cell cycle?
A cell that contains 8 chromosomes at G1 will have how many chromosomes after anaphase?
When does DNA duplication occur?
Which of the following statements are CORRECT?
1. Mitotic events can be observed with a light microscope
2. Sister chromatids are generated during prophase
How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in the G2 stage of the cell cycle?
Which of the following can be found in diploid cells in G1 phase?
A human gamete stuck in G1 phase would have how many chromosomes?
The role of the G1 checkpoint is:
At what phase of mitosis does the nuclear envelope first fragment?
A human somatic cell stuck in G2 phase would have how many pairs of sister chromatids?
A fluorescent dye that binds to DNA is added to a population of proliferating cells. The amount of fluorescence is directly proportional to the amount of DNA found in each cell. The following graph is generated:
Indicate on the graph where cells in each phase of the cell cycle (G1,S,G2,M)(G_1,S,G_2,M) are represented
A centromere joins a pair of
Practice Problem 4
Describe the forms that chromatin can take in the interphase nucleus.
More The Genome & Chromosomal Structure Questions:
Cell Cycle
The frog species Xenopus laveis has four copies of its genome in every somatic cell. What are the coefficients of n and C, respectively, of a Xenopus cell before S phase and after S phase? (Listed as: n, C (before) : n, C (after))
Which of the following statements about homologous chromosomes is true?
Genome structure
Which of the following statements are true and which are false:
A. The number of unique genes in an organisms determines its genome size
B. A species with low gene density has really large introns.
C-value of the Karyotype
How many copies of the genome are found in the following karyotype of the Green Toad:
Cell Cycle
The frog species Xenopus laveis has four copies of its genome in every somatic cell. What are the coefficients of n and C, respectively, of a Xenopus cell before S phase and after S phase? (Listed as: n, C (before) : n, C (after))
A centromere joins a pair of ______
Where are centrioles located?
Choose all the choices that describe epigenetic modification.
Which of the following statements about homologous chromosomes is true?
Which of the following described alleles?
Practice Problem 1
Which of the following statements are true, and which are false? Explain.
a. Histones are negatively charged.
b. The histone octamer consists of four H1, each paired with one of H2A, H2B, H3, or H4.