Class Notes (837,611)
Canada (510,370)
Psychology (4,075)
PSY2105 (189)

Class 5. Genetics+ Prenatal Development.docx

3 Pages
Unlock Document

Caroline Sullivan

Genetics & Prenatal Development Ge Chromosomes – store and transmit genetic information.  DNA – substance of which genes and chromosomes are made.  Genes – segments of DNA located along the chromosomes. Chromosomes, Cells, and Sex: Terms Autosomes The 22 pairs of chromosomes that are not sex chromosomes • 23rd pair of chromosomes Sex Chromosomes • Determine sex • XX = female, XY = male Gametes / Sperm and ova Sex Cells Zygote Sperm and ovum united Fraternal/Dizygotic  Two zygotes, or fertilized ova Identical/Monozygotic  One zygote that divides into two individuals Alleles  Forms of the same gene on a pair of chromosomes: o Appear at the same place on each chromosome in the pair o One allele is inherited from each parent Principles of Heredity  Mendel argued that certain traits are transmitted from parents to child o Each trait is governed by two elements with one from each parent o Phenotype refers to the expressed trait o Genotype refers to the underlying genes that govern the trait Dominant Vs. Recessive Traits  Dominant o Brown eyes o Dark hair o Freckles o Dimples  Recessive o Blue or green eyes o Baldness o Blond hair o No freckles o No dimples Are Men Obsolete?  Parthenogenesis: “virgin birth”, reproductio
More Less

Related notes for PSY2105

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.