Meiosis
Mitosis
Electron Micrographs
Cartoon Diagrams
Radom Questions
100
What occurs during prophase 1?
Prophase 1 takes up about 90%
Chromosomes begin to condense
synapsis occurs
crossing over occurs at they chiasmata
each pair of chromosomes form a tetrad
100
Why do we do mitosis?
For growth, repair, and asexual reproduction
100
what is cytokinesis
100
what is Metaphase
100
Which is more similar to mitosis: meiosis 1 or meiosis 2?
Meiosis 2
200
What occurs during metaphase 2?
Sister chromatids are lined up at the metaphase plate
200
Do we form sister chromatids during mitosis? If so when.
We form sister chromatids during interphase when we duplicate our chromosomes
200
what is prophase
200
what is metaphase 1
200
Are sister chromatids homologous in meiosis 2?
No.
300
What occurs during metaphase 1?
Tetrads line up at the metaphase plate
300
What is an aster?
An aster is the array of microtubules coming out of the centrosome
300
what is telophase
300
what is Anaphase 1
300
what are the three mechanisms that allow for genetic variation?
1. crossing over
2. independent assortment of chromosomes
3. random fertilization
400
what occurs during anaphase 1?
homologous chromosomes separate
sister chromatids remain attached at the centromere
400
How to prokaryotes replicate. Explain thoroughly.
Starting at the origin, DNA replicated.
2 origins move to opposite ends of the cel
then daughter cells split apart each containing an origin.
400
what is anaphase
400
what is anaphase 2
400
what are recombinant chromosomes?
A mix of genes on each chromosome as a result of crossing over
500
what are sister chromatids and when do they form?
Sister chromatids are replicated and identical chromosomes.
They are formed after replication in interphase before meiosis 1
500
What is the cyclin-CDK complex that allows the cell to pass from G2 to M phase
MPF
500
what is metaphase
500
what is anaphase
500
when are cohesions cleaved off during mitosis and meiosis?
In mitosis: at the end of metaphas
In meiosis: cleaved off the arms at the end of anaphase 1 and cleaved off the centromere at the end of anaphase 2