Question

Mr. and Mrs. Rivera do not have a widow’s peak. They look like everyone else in their family, but they recently learned that they are both carriers for the recessive widow’s‑peak gene.

They have three children:

Liam – He does have a widow’s peak.
Maya – She does not have a widow’s peak and is a carrier.
Sofia – She does not have a widow’s peak and is not a carrier.
When Liam becomes an adult, he marries Elena, who does not have a widow’s peak and is not a carrier. They have one son, Noah, who does not have a widow’s peak.

Maya grows up and marries Owen, who does have a widow’s peak. They have two daughters:

Emma – has a widow’s peak
Chloe – does not have a widow’s peak but is a carrier
Sofia decides not to have children. what generation are they in?

Answer 1

Numbering generations from the Riveras as Generation I:

- Mr. and Mrs. Rivera = Generation I
- Liam, Maya, Sofia (their children) = Generation II
- Noah, Emma, Chloe (grandchildren) = Generation III

So Sofia is in Generation II; Noah, Emma and Chloe are in Generation III.