WERE THE BABIES SWITCHED?

Activity No. ___

WERE THE BABIES SWITCHED?

Scenario:

Two couples had babies in the same hospital at the same time. Alvira and Amante had twins, a boy named Christian, and a girl, Clara. Susan and Garry had a girl, Mara. Alvira convinced that there had been a mix-up and she had the wrong girl, since Christian and Mara were both light-skinned, while Clara had darker skin. Alvira insisted on taking blood type tests for both families to check whether there had been a mix-up. In order to interpret the results of the blood type tests, you will need to understand the basic biology of blood types.

1. Evaluate whether Alvira and Amante’s baby girl was switched with Susan and Garry’s baby girl. The following family tree shows the blood types for both families.

.2. Additional questions will be given during the class. LBL