Interphase
Stages of Mitosis
Stages of Meiosis
Purpose & Regulation of the Cell Cycle
Asexual vs Sexual Reproduction
Identify
300
What happens during the S phase of interphase?
Synthesis
DNA replication
Double chromosomes, double DNA
300
During which stage of mitosis do sister chromatids separate and move towards opposite poles of the cell?
Anaphase
300
What is the result of meiosis in terms of the number of daughter cells produced?
4 haploid cells
300
Substances known to produce or promote cancer are called
carcinogens
300
Define sexual reproduction.
Two parents. Offsprings are genetically unique.
300
Prophase I
310
During which stage of interphase does DNA replication occur?
S phase
310
What happens during the metaphase stage of mitosis?
Spindle fibers line up chromosomes in the middle/center of the cell.
310
What happens during crossing over in meiosis?
Genetic information/material are exchanged between homologous chromosomes.
310
Why is it important for cells of multicellular organisms to undergo mitosis?
Produces cells that are identical to the original dividing cell.
Also: growth, repair, replacement
310
What process, Mitosis or Meiosis is sexual reproduction?
Meiosis
310
After Telophase (Mitosis) and Telophase I and II (Meiosis)
Cytokinesis
320
What are the three stages of interphase?
G1, S, G2
320
What is the stage of mitosis where the nuclear envelope reforms and the chromosomes decondense?
Telophase
320
What is the major difference between meiosis I and meiosis II?
Crossing-over only occurs in Meiosis I
I produces 2 cells
II produces 4 cells
320
If a cell fails to go through S phase of the cell cycle before mitosis, what might be wrong with the daughter cells?
During the S phase, DNA is replicated; therefore, if this phase is not completed properly, daughter cells may not have adequate DNA to function properly.
320
Which, Mitosis or Meiosis is Asexual reproduction
Mitosis
320
Name the process depicted above.
Crossing over
330
What is the purpose of interphase?
The cell grows and synthesizes organelles so the cell is able to function once it matures.
Prepares cell for division
330
What stage of mitosis occurs before cytokinesis?
Telophase
330
When does interphase occur in Meiosis?
Before Meiosis I! NO interphase in Meiosis II
330
What happens if the cell cycle is not regulated/controlled?
cells can divide without order and accumulate genetic errors that can lead to a cancerous tumor
Diseases
Cancer
330
What are the advantages of asexual reproduction?
Only need one parent.
Faster
330
What are the arrows identifying?
sister chromatids
340
What is the longest phase of interphase?
G1
"Growth phase"
340
What is the first stage of mitosis where the chromosomes condense and become visible?
Prophase
340
How many rounds of cell division occur during meiosis?
2
340
What is apoptosis and how does it relate to the cell cycle?
self programmed for cell death
A control method to regulate the cell cycle. Get rid of diseased cells.
340
Define asexual reproduction.
generates offspring that are genetically identical to a single parent
340
Anaphase I