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The Cell Cycle Mitosis Interphase G 1 S G 2 Prophase Metaphase Anaphase Telophase

Big picture: We need to make more cells

Interphase Cell Grows and replicates DNA

S phase replicates DNA Interphase G 1 S G 2

Here is what DNA looks like in chromosome form

So if I have two chromosomes and I replicate them Replicates

If I have 10 they go through S phase…. DNA Replicates

So if humans have 46 then they are replicated….

We have an issue… too much chromosome for one cell Now we will begin the process of splitting the replicated chromosome( ) and making 2 IDENTICAL cells PMAT

Now Mitosis Begins Prophase: Prophase Chromosome Appear, nucleus breaks down Nucleus

Metaphase Chromosomes Line up so they can be split Where’s the nucleus? ?

Anaphase-Chromosome Split Anaphase Where’s the nucleus? ?

Telophase 2 nuclei

Cytokinesis

If I have 46 chromosome before mitosis starts, how many do I have afterwards? ? ? 46 Mitosis 46

If this potato has 32 Chromosome before mitosis, how many after? ? 32!

If Jerry has 987 chromosomes before mitosis how many after mitosis? 987

Mitosis Used for Growth and repair

Meiosis How many cell divisions? ? ? 2

Notice the homologous pairs line up NEXT to each other Crossing Over

Crossing Over leads to increased_____ Genetic Diversity

Meiosis leads to the production of _____ Gametes Specifically….

46 23 23

So if Forrest Gump has 48 Chromosomes… How many in each gamete after meiosis? 24

If Patrick has 102 chromosomes before Meiosis how many in each gamete after? 51

Uncontrolled Cell growth Cancer is _______

DNA fingerprinting… who did it?

Where is the trisomy? ? Trisomy 21

What is this process called? Transcription m. RNA