Textbook Notes (368,316)
Canada (161,798)
Biology (657)
Chapter 1

CHAPTER 1.docx

2 Pages
Unlock Document

Bhagwati Gupta

CHAPTER 1: Introduction to Genetics Albinism in the Hopis - Albinism is caused by a defect in one of the enzymes required to produce melanin, the pigment that darkens our skin, hair, and eyes, - People with albinism don’t produce melanin and, consequently, have white hair, light skin, and no pigment in the irises of their eyes - Melanin protects the DNA of skin cells from the damaging effects of UV in sunlight, and melanin’s presence in the developing eye is essential for proper eyesight - Inherited as an autosomal recessive trait - Albinism is caused by defects in any one of several genes that control the synthesis and storage of melanin - Form of albinism found in the Hopis is oculocutaneous albinism type 2, due to a defect in the OCA2 gene on chromosome 15 - In most human groups, albinism is rare (1 in 20,000 persons), in Hopis 1 in 200 - Hopis value albinos in their culture 1.2Genetics Is Important to Us Individually, to Society, and to the Study of Biology - Genes are fundamental to who and what we are - Genetically engineered crops constitute a significant proportion of all the food produced worldwide - Pharmaceutical industry and medicine - The role of genetics in biology: all organisms use genetic systems that have a number of features in common  Evolution  Developmental biology  Taxonomy, ecology, and animal behaviour - Genetic diversity and evolution: all living organisms use a similar genetic system  Genome: set of genetic instructions encoded in nucleic acids (DNA or RNA)  Genetic variation is the foundation of evolutionary change - Divisions of genetics:  Transmission genetics: basic principles of heredity and how traits are passed from one generation to the next, with a focus on individual organisms.  Molecular genetics: chemical nature of the gene  Population genetics: genetic composition of groups of individual members of the same species and how that composition changes geographically and with time -
More Less

Related notes for BIOLOGY 2C03

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.