Meiosis & Sexual Reproduction

Meiosis & Sexual Reproduction

AP Biology

2007-2008

Cell division / Asexual reproduction ? Mitosis

u produce cells with same information

? identical daughter cells

u _______________________

? clones

u same amount of DNA

? __________________________ ? __________________________

AP Biology

Aaaargh! I'm seeing

double!

Asexual reproduction ? Single-celled eukaryotes

u yeast (fungi)

u Protists

? Paramecium ? Amoeba

? Simple multicellular

eukaryotes

u Hydra

budding

AP Biology

What are the disadvantages of asexual reproduction?

What are the advantages?

budding

How about the rest of us? ? What if a complex multicellular organism

(like us) wants to reproduce?

u joining of egg + sperm

? Do we make egg & sperm by mitosis? No!

What if we did, then....

46 + 46

egg

AP Biology

sperm

92

zygote

Doesn't work!

Human ________ karyotype

AP Biology

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