AP Lab 3 Mitosis and Meiosis

Review:Mitosis and the cell cycle

PhasesG1, S, G2

Parts of microscope and troubleshooting!

Lab Tips!Complete 3A on your own.For 3A2, work in partnerships.

One person calls out phases, the other records in Table 3.1COUNT A MINIMUM OF 200 CELLS!

Onion Root Tips: look at the apical meristem!

http://www.lima.ohio-state.edu/biology/images/roottip.jpg

http://www.lima.ohio-state.edu/biology/images/apical_meristem.jpg

Quick Review:

What is the goal of meiosis?What are the phases and actions in the phases?What is crossing

over?What is the resultof crossing over?

http://www.ekcsk12.org/science/aplabreview/mitosismeiosislab.html

Fig. 10.11, p. 172

2n

n

2n

germ cell germ cell

each chromosome duplicating during

interphase

MEIOSIS Iseparation of homologues

MEIOSIS IIseparation of

sister chromatids

diploid number restored at fertilization

zygote

gametes gametes

Sordaria ascospores

Sordaria ascospore images from http://www.ac-orleans-tours.fr/svt/theme4/sordaria/pcdefault.htm

Debrief:Any questions on main concepts?

MitosisMeiosisGametogenesis

Mitosis Findings:Which phase dominated?Any questions on analysis questions?

Meiosis Findings:

Any questions on analysis questions?