Compare to Binary Fission which occurs in prokaryotes, proplastids of chloroplast, mitochondia
Review nucleoid area with circular DNA
Examine Figures Handed Out in Class
Would the daughter cells be genetically like one another and like the mother cell?
Define the following terms:
Diploid/Haploid
Homologous Pairs of Chromosomes
Cell Cycle
Examine Figures Handed Out in Class
Compare mother cells to daughter cells as far as number of chromosomes and genetically identical.
Compare mitosis with meiosis
Examine Figures Handed Out in Class
Mitosis
Interphase DNA replication
Prophase
Metaphase Chromosomes
line up
Anaphase Sister
chromatids separate
Telophase
Cytokinesis
Two daughter cells with same number of chromosomes and
genetically identical.
Meiosis
Interphase
DNA replication
Prophase I
Stnapsis occurs - homologous chromosomes come together in pairs and chiasmata
occur
as chromatids of homologues exchange parts.
Metaphase I Synapsid Homolgous
Chromosomes line up
This is where crossing over may occur which will provide new gene
combinations for linked genes.
Anaphase I Homologous
Chromosomes separate
Telophase I
Cytokinesis How many cells are formed
at this point? are they diploid or haploid?
Interphase II No DNA replication
Prophase II No synapsis
Why can't synapsis occur at this point?
Metaphase II Chromosomes line up
Anaphase II Sister chromatids
separate
Telophase II
Cytokinesis
Four daughter cells with one of each homologous pair of
chromosomes and not genetically identical
Refer to mitosis and meiosis diagrams handed out in
class.
Mother Cell contains three homologous pair of chromosomes – with the following allele pairs (Aa, Bb,cc)
Describe the daughter cells after mitosis? Each daughter cell will have the following allele pairs: Aa,Bb,cc
Describe the daughter cells after meiosis? Four possible cells
may form: ABc, Abc, aBc, abc