Class Notes (808,045)
Canada (493,031)
Biology (Sci) (2,417)
BIOL 202 (224)

Notes Lecture 2.odt

3 Pages
Unlock Document

McGill University
Biology (Sci)
BIOL 202
Daniel Schoen

Notes Lecture 2 Conferences start on the 21 of january. READ THE CHAPTERS PROBLEM SET 1 IS ONLINE Law of equal segregation -->inheritance pattern wt single genes chromosomal basisof inheritance patterns CDH1 gene-->E-cadherin protein. (used in zonula adherens, it is a transmembrane protein, thats associated with the actin filaments, plays a role in adhesion). When mutated, cells aren't stuck together as much, cells can move more freely, encouraging metastasis of the cancer. (dominant mutation, in this case) gastric cancer, 1-3% of the time is due to a genetic mutation If you have a mutation of the above gene, the probability of developping gastric hancer is very high. Esophagojejunostomy, attach the esophagus to the duodenum, make a pouch near the jejunum that sort of replaces the stomach (?) The pt did have cancer, in the end, after looking at her stomach, post removal. Genetics prior to mendel===> “ Blending inheritance” (aristotle=mixture of semen and menstrual blood) Mendel and Garden Peas: 2 different types of crosses--> Cross pollination and Selfing CP==> transfer of pollen with a brush, removal of anthers, progeny Selfing-->transfer pollen to sigma. Mendel studied phenotype whose expression is influenced by gene action When he selfed (the same type mated with the same type) Different type with different type. Punnet square used to explain the probability of showing the different phenotypes. (singl gene model) (law of equal segregation) The Law of Segregation states that every individual possesses a pair of alleles (assuming diploidy) for any particular trait and that each parent passes a randomly selected copy (allele) of only one of these to its offspring. The offspring then receives its own pair of alleles for that trait. Whichever of the two alleles in the offspring is dominant determines how the offspring expresses that trait (e.g. the color and height of a plant, or the
More Less

Related notes for BIOL 202

Log In


Don't have an account?

Join OneClass

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

Sign up

Join to view


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.