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26 Cards in this Set

  • Front
  • Back
What is the term used to define the stage in the cell cycle were the cytoplasm of a cell is divided?
Cytokinesis
What is the term used to define division of a cell so both the daughter and parent cells are identical copies?
Mitosis
What is the term used to define a type of cell division in which the parent and daughter cells are genetically variable and the daughter cell has half the genetic information of the parent?
Meiosis
Each chromosome is made of two identical halves called XXXXXXX XXXXXXXX joined at the XXXXXXXX?
Sister Chromatids/Centromere
Humans have XX chromosomes, XX homologous pairs, consisting of a total of XX chromatids.
46/23/92
In animals each microtubule organizing center contains a pair of XXXXXXX?
Centrioles
What are the four phases of mitosis?
prophase/metaphase/anaphase/telophase
Cytokinesis begins during XXXXXXXX?
Telophase
What is the S phase of the cell cycle associated with? (2)
Growth and duplication of DNA
What 5 events occur during the M-phase of mitosis?
prophase/metaphase/anaphase/telophase/cytokinesis
Put the S-phase, G1 phase, M-phase, and G-2 phase in order starting with G1 phase first.
G1 Phase/S-Phase/G2 Phase/M-Phase
What three activites occur simultaneously during prophase?
1. Nucleoli disappear and chromatin condense into chromosomes
2. Nuclear Envelope Breaks down
3. The Mitotic Spindle is assembled
What is the term used to define a plane lying between the two poles of the spindle during the metaphase?
Metaphase Plate
What marks the beginning of metaphase? What marks the end?
When the chromosomes are distributed across the metaphase plate/When the chromosomes are pulled to opposite sides of the cell.
What marks the beginning of anaphase?
The moment the chromosomes start seperating to opposite poles of the cells.
During what phase of mitosis does a nuclear envelope develope around each pole?
Telophase
Cytokinesis differs in plants and animals by the formation of two kinds of structures, the cell plate and the cleavage furrow? Which structure belongs to plants and which to animals?
Cell Plate- Plants
Cleavage Furrow- Animals
A cell has a total of 46 chromosomes at the beginning of mitosis, at metaphase, how many chromosomes does that cell have?
92
A cell has 46 chromosomes before meiosis, how many chromosomes does each daughter cell have at the very end of meiosis?
23 chromosomes
When does synapsis take place in meiosis?
Prophase I
Were does meiosis take place in humans?
Sex Cells
In meosis I what is the chromosome arrangement on the metaphase plate?
Homologues are lined up
In mitosis are the daughter cells considered genetically variable? What about meiosis?
Mitosis-No
Meiosis- Yes
In plants meiosis usually produces XXXXXX?
Spores
What are two of the main factors that regulate the cell cycle?
1. Surface area to volume ratio
2. Genome to Volume Ratio
What is the term used to define uncontrolled cell growth and division?
Cancer