Lab 9b: Meiosis • Prelab 9 and Informal Lab Report is due. • Microworlds are due NEXT CLASS! – You should have time to work on it today. – Turn in all 10 Microworlds including the 4 that have been graded. – You may use mitosis & meiosis slides for this.
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Lab 9b: Meiosis Prelab 9 and Informal Lab Report is due. Microworlds are due NEXT CLASS! – You should have time to work on it today. – Turn in all 10 Microworlds.
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Lab 9b: Meiosis
• Prelab 9 and Informal Lab Report is due.
• Microworlds are due NEXT CLASS!– You should have time to work on it today.– Turn in all 10 Microworlds including the 4 that
have been graded.– You may use mitosis & meiosis slides for this.
Chromosomes
Mitosis makes cells, but what about making babies?
• Does Mitosis produce gametes (sex cells: egg and sperm)?
Meiosis
• Resembles 2 rounds of mitosis• 2 cell divisions (meiosis I and meiosis II)• 4 resulting haploid cells
HAPLOID= 1 copyDIPLOID = 2 copies
MeiosisHaploid gametes (n = 23)
Egg cell
Sperm cell
FertilizationMeiosis
Diploidzygote
(2n = 46)
n
Multicellulardiploid adults
(2n = 46)
Mitosis anddevelopment
2n
n
A Meiosis video in a nematode. A little slow downloading but only 24 sec.
A Meiosis video in a nematode. A little slow downloading but only 24 sec.