Instructional Video6:22
Bozeman Science

X Inactivation

12th - Higher Ed
Paul Andersen explains how X inactivation works in mammals. This process was first described by Mary Lyon. Each cell in a female will have on activated and one inactivated X chromosome. This explains why almost all calico cats are female.
Instructional Video
Bozeman Science

Bozeman Science: X Inactivation

9th - 10th
Paul Andersen explains how X inactivation works in mammals. This process was first described by Mary Lyon. Each cell in a female will have on activated and one inactivated X chromosome. This explains why almost all calico cats are female.