Class Notes (837,621)
Canada (510,370)
BIOL 1000 (60)
Lecture 45

BIOL 1000 Lecture 45: Lecture 45

3 Pages
Unlock Document

Biological Sciences
BIOL 1000
Kevin G.Scott

o982 Do Individuals Evolve? Common belief – individual organisms evolve during their lifetime ***misconception Natural selection acts on individuals Each individual’s combination of traits affects its survival & reproductive success Evolutionary impact of natural selection only evident in the changes in a population over  generations  Population = a group of individuals of the same species that live in the same area and interbreed Measure evolution as change in prevalence of certain heritable traits in a population over a span of generations  Different populations of same species may be isolated from one another, with little interbreeding  (little exchange of genes) Common in populations confined to widely separated islands or in different lakes Gene pool = the total collection of genes in a population at any one times Consists of all the alleles in all the individuals making up a population Micro-evolution = occurs when relative frequencies of alleles in a population change over a number of generations Mutation and Sexual Reproduction Produce the Genetic Variation that Makes Evolution Possible Darwin couldn’t explain the cause of variation among individuals, or how variations passed from  parents to offspring He only knew that natural selection favoured some heritable traits over others, and was the primary mechanism for change  Mendel discovered the hereditary processes required for natural selection  Not all variation in a population is heritable Phenotype results from a combination of inherited genotype and environmental influences Many characters that vary
More Less

Related notes for BIOL 1000

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.