Genes_and_the_Environment_student.pptx - Genes and the Environment How the environment influences gene expression Influence of Environment Many traits

Genes_and_the_Environment_student.pptx - Genes and the...

This preview shows page 1 - 18 out of 53 pages.

Genes and the Environment How the environment influences gene expression
Image of page 1

Subscribe to view the full document.

Influence of Environment Many traits are purely genetic, uninfluenced by environment However, other traits can be changed or modified by environmental influences
Image of page 2
Epigenetics Our environment influences our mental and physical health, and can change the functioning of the genes we inherit at birth. Epigenetics therefore refers to how genes are controlled by a series of switches. The food we swallow, the air we breathe, or even the affection we receive from our parents have the power to turn gene activity "on" or "off."
Image of page 3

Subscribe to view the full document.

Himalayan Rabbits Warm body parts white fur Cool body parts black fur
Image of page 4
Image of page 5

Subscribe to view the full document.

Image of page 6
Image of page 7

Subscribe to view the full document.

Drosophila melanogaster Fruit flies raised at 16°C have straight wings Fruit flies raised at 25°C have curly wings
Image of page 8
Temperature and Sex Determination Tortoises and turtles Males develop at cool temperatures Females develop at warm temperatures Lizards and alligators Males at warm temperatures Females at cool temperatures Crocodiles and snapping turtles Females at cool and warm temps Males at intermediate temps
Image of page 9

Subscribe to view the full document.

Humans Height Caffiene Intelligence Reading Nutrition
Image of page 10
Traits unaffected by the environment Pol yda ctyl y Col or bli nd ne ss Bl oo d ty pe Ey e col or
Image of page 11

Subscribe to view the full document.

Teratogens Environmental factors Permanently alter traits Cause birth defects
Image of page 12
Examples of teratogens Antibiotics & Drugs Insecticides Viruses (Measles) Radiation Industrial chemicals (arsenic, mercury, etc)
Image of page 13

Subscribe to view the full document.

Tranquilizers - chlorpromazine , meprobamate, reserpine Sulphonamides - sulphanilamide, sulfathiazole Barbiturates - sodium barbital, Phenobarbital Anti-nausea - thalidomide Synthetic hormones - diethylstilbestrol (DES) Alcohol Anti-acne - Accutane Teratogenic drugs
Image of page 14
Image of page 15

Subscribe to view the full document.

Image of page 16
Breeding strategies Selective breeding
Image of page 17

Subscribe to view the full document.

Image of page 18
  • Spring '17
  • Rygh

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask You can ask ( soon) You can ask (will expire )
Answers in as fast as 15 minutes