Class Notes (839,081)
Canada (511,183)
Biology (6,826)
Biology 1001A (1,727)
Tom Haffie (1,170)
Lecture 11

Lecture 11.docx

2 Pages

Course Code
Biology 1001A
Tom Haffie

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Biology 1001A Inheritance of Variation October 17, 2012  Where are the genes for making a uterus?  X chromosome of mother, X chromosome of father and autosomes like Chr6 and 14, aka everywhere  People used to believe that inheritance was by “blending”  Aka dark skinned person and light skinned person would make a medium coloured person  Kind of like mixing paint  Polygenic traits shown continuous variation in a population  Dominant alleles make your skin darker, recessive alleles make your skin lighter  Continuous variation from one side to the other  If inheritance is blending, if you cross two intermediates together, you can get extreme types back among offspring for polygenic traits (controlled by many genes)  Mendel: Inheritance is not blending, it’s particulate. There are factors that contribute to inheritance  Careful experimentation with controlled crosses and quantitative analyses led to an explanatory model  Variations in traits due to different alleles  Alleles segregate randomly into gametes  Organisms inherit two alleles froe ach trait  Appearance of heterozygotes determined by dominant alleles  Gametes come from meiosis  Punnet squares distributed like that (Pp separated) because of separation during meiosis  Product rule of probability: multiply together to get a quarter (½ p x ½
More Less
Unlock Document

Only 80% of the first page 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


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.