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Biol 1009 exam 2
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What is a homologus chromosome
Chromosome that look identical and contain the genes to determine traits.
Allele
Different forms of the same genes
Daughter cell
When a cell divides and splits into towo identical cells
What is mitosis
The division of a nucleus into two subunits
5 phases of Mitosis
Prophase
Prometaphase
Metaphase
Anaphase
Telophase
What happens during prophase
DNA Condenses into chromosomes
Spindle fibers begin to form
The nucleus disappears
What happens during Prometaphase?
The nuclear envelope disappears by breaking into small peices
The spindle fibers begin to connect to the kinotechores
The centromes begin to move toward the equator(metaphase plate)
What happens in metaphase?
The centromes align at the metaphase plate
The centrome of each chromatid is "digested" so the chromatids are no longer attatched
What happens in anaphase?
The chromosomes seperate from each other
The choromosomes move towards their poles
What happens in Telopahase
The chromoseomes have reached the poles
the nuclear envelope reforms
Cytokenisis pinches the cell into two seperate daughter cells
Cytokenesis
When the cytoplasm spilts
Starts during anaphase in animal cells, creates a cleavage furrow
What is meiosis?
Divisio in which the number of chromosomes is reduced by half
Involves two cell divisions
What happens during Meiosis- Prophase
Spindle aparatus forms
chromosomes condense
Hommologus pairs form a tetrad
What happens during Meiosis- Metaphase
Homologous pairs line up in the middle on the metaphase plate
What happens during Meiosis- Anaphase
Author
christine_avery
ID
46755
Card Set
Biol 1009 exam 2
Description
bio 2
Updated
2010-11-02T16:00:17Z
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