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Mitosis
Mitosis
17
Biology
Undergraduate 1
03/23/2012

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Term
Mitosis is
Definition
when a cell duplicates into 2 daughter cells which are diploid
Term
What is interphase
Definition

3 phases:

G1- DNA unwinds and all the necessary proteins for DNA sysntheses are made

S- DNA unwinds and both strands are duplicated leading 2 2 sets of DNA

G2- All the stuctural proteins are made

Term
When does transcription occur in Interphase
Definition
during G1 and G2
Term
What is meiosis
Definition
The process by which gametes reduce their DNA content
Term
What is diploid
Definition
Cells that have 2 set of chromosomes
Term
What is haploid
Definition
Cells that contain 1 set of chromosomes
Term
 What happens during Mitosis Prophase
Definition

Nuclear envelope breaks

centrosomes go to each pole

Spindle fiber start pulling/ pushing the chromosomes to the middle

chromatin condenses into chromosomes

Term
What happens during Mitosis Metaphase
Definition
chromosomes line up in the middle
Term
What happens during Mitosis Anaphase
Definition
centromere breaks down and each sister chromatid is pulled to a centrosome
Term
What happens during Mitosis Telophase
Definition
nuclear envelopes reassembles and chromosomes spread out
Term
What happens in meiosis Prophase I
Definition

Nuclear envelope breaks down

Homologs form

start lining up

recombination of homologs

 

Term
What happens in meiosis Metaphase I
Definition
homologous chromosomes line up at center
Term
What happens during meiosis Anaphase I
Definition
centrosomes start pulling a homolog to each centrosome
Term
What happens during meiosis Prophase II
Definition

centrosomes go the poles and form spinfdle fibers

then they start to line up at the middle

Term
What happens during meiosis Metaphase II
Definition
chromosome line up at the middle
Term
What happens during meiosis Anaphase II
Definition
chromosomes seperate at the centromere and start to get pulled to the centrosome
Term
What happens during meiosis telophase
Definition

nuclear envelope reassmebles

and chromosomebreak down into the nucleus

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