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Objective 3:
Can You Make DNA? Play
the Double Helix game and find out!
Cornell researchers 'unzip' molecules (optional)
Objective 4:
Does
DNA have an overall charge?
Objective 6:
How
is DNA replicated?
Leading
Strand Replication animation
DNA
Replication Review animation
Objective 10:
Okazaki
fragments
Synthesis
of the Lagging Strand animation
Objective 15:
Can you control the cell cycle? Play
the Cell Cycle game and find out!
Cell
cycle clock and cancer
Cell surface changes during
the cell cycle
Objective 16:
Centromere Sequence (16c)
Objective 17:
3
ways eukaryotic and prokaryotic chromosomes differ (17b)
Objective 18:
Slides
Objective 23:
Asexual
reproduction
Sexual
reproduction
Objective 24:
Slides
- oogenesis in Ascaris
New use for polar bodies (optional)
Objective 25:
Slides
- stages of meiosis / mitosis
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Eukaryotic vs Prokaryotic Chromosomes
HOW DO THE CHROMOSOMES OF PROKARYOTIC CELLS DIFFER FROM THOSE OF
EUKARYOTIC CELLS?
- Except in the mitochondria and other organelles, eukaryotic
chromosomes are linear whereas prokaryotic chromosomes are circular.
- Eukaryotes
typically have many chromosomes, whereas prokaryotes have only a single chromosome.
- Eukaryotic chromosomal DNA in the nucleus is wound on nucleosome cores
whereas prokaryotic DNA is “naked”—i.e., there are no nucleosomes
or other proteins on which the DNA is wound.
- Most eukaryotic cells are diploid,
receiving a set of chromosomes from each parent. Thus their chromosomes
occur in homologous pairs, each consisting
of
one chromosome from each parent bearing basically the same genes in the
same order. Prokaryotes are haploid; their single circular chromosome is
unpaired.
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