Jack and Jill (2011)

 

Concept featured in film: Genetics/Twins

Location of clip: 12:40 - 15:15 (DVD)

Play Flickclip Here

Summary of clip: Jill is visiting her twin brother Jack and his family for Thanksgiving. They are having a discussion about twins feeling each other's pain. Jill reminds Jack that they are connected because they grew together and shared a womb.

Connection of flickclip to the concept: Sexual reproduction occurs when sperm fertilizes an egg. The fertilized egg has 12 of its DNA from the mother and 12 of its DNA from the father. Identical twins are a product of one fertilized egg that splits and shares 100% of their DNA while fraternal twins develop from two different eggs. Fraternal twins share DNA as much as any other brother and sister.

Suggestions to Teachers:

1. Suggested questions for students when viewing the clip:

If Jack and Jill are twins, are they exactly alike?

What is the difference between identical and fraternal twins?

Is it possible for twins that share a womb to look nothing alike?

2. Have students research various twin studies. Do twins that were separated at birth have similar lifestyles, physical characteristics, and interests?