Describe a polyploid organism? What are some consequences of this? Warm Up Describe a polyploid organism? What are some consequences of this?

What are twins? How could this occur?

Twins Two offspring produced in the same pregnancy. Identical or Fraternal

Identical Develop from one Egg that splits and forms two embryos.

Fraternal Develop from two separate eggs that are fertilized by two separate sperm.

Identical Twins, Identical Fates? An Introduction to Epigenetics

What exactly are twins, and how do they arise What exactly are twins, and how do they arise? Your response should distinguish between the two different types of twins.

Do you think identical twins completely identical? Why or why not?

What can studying twins tell us about the genetic influence on a particular trait?

Speculate on some ways that the environment might have an influence on a person’s genes.

Do you think Elise needs to be worried about her own mental health Do you think Elise needs to be worried about her own mental health? Why or why not? If you were a health-care professional, what would you advise Elise to do?