Class Notes (839,194)
Canada (511,223)
York University (35,583)
Natural Science (2,813)
NATS 1610 (133)
Lecture

The Living Body 2 - Mitosis.docx

3 Pages
107 Views

Department
Natural Science
Course Code
NATS 1610
Professor
Barbara Czaban

This preview shows page 1. Sign up to view the full 3 pages of the document.
Description
NATS 1610 WINTER TERM L21 – Forming the Living Body – Mitosis Three distinct but interconnected events of CELL DIVISION • Duplication of genetic material (DNA) − Replication • Equal distribution of genetic material − Mitosis • Division of cytoplasm − Cytokinesis Preparation for Cell Division • DNA replicated • Sister chromatids − 2 identical copies of DNA − With associated proteins • Tightly associated at centromere − Serves as attachment site for kinetochore (proteins) used in sorting chromosomes MITOTIC SPINDLE APPARATUS (or mitotic spindle) organizes and sorts the chromosomes during mitosis • Centrosomes − Microtubule organizing center (MTOC) − Single centrosome duplicates at the beginning of M phase o Each will define a spindle ‘pole” • Spindle formed from microtubules − Polymers of tubulin proteins • Different sets of microtubules − Astral – position spindle in cell − Polar – separate 2 poles − Kinetochore – attached to kinetochore bound to centromeres of each chromosome Prophase • Duplicated chromosomes condense & become visible • Nuclear envelope starts to break down • Centrosomes move apart & mitotic spindle begins to form Prometaphase • Nuclear membran
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit