Question

🎯 Student Task
Students should create a pedigree chart showing:

Carriers
Affected individuals
Unaffected individuals
Generations I, II, and III
Correct symbols (circle = female, square = male)
Trait: Widow’s Peak (recessive)
Affected = has a widow’s peak
Carrier = doesn’t show the trait but can pass it on
Story:
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.

Answer 1

Legend
- Square = male, Circle = female
- Affected (has widow’s peak) = ww (recessive)
- Carrier (doesn’t show trait but can pass it on) = Ww
- Unaffected, not a carrier = WW

Pedigree (Generation I at top, II middle, III bottom).
I: Mr. Rivera and Mrs. Rivera are carriers (both Ww).

Gen I
[■ Mr. Rivera (Ww)] — [○ Mrs. Rivera (Ww)]
|
┌─────────┴─────────┐
| |
Gen II | |
[■ Liam (ww)] [○ Maya (Ww)] — [■ Owen (ww)]
| | |
| | ┌────┴────┐
| | | |
[■ Noah (Ww)] [○ Emma (ww)] [○ Chloe (Ww)]
(child of Liam & Elena) (child 1) (child 2)
|
[○ Sofia (WW)]
(no children)

Notes / genotypes for each person
- Mr. Rivera: carrier (Ww), unaffected
- Mrs. Rivera: carrier (Ww), unaffected
- Liam: affected (ww)
- Maya: carrier (Ww), unaffected
- Sofia: unaffected non-carrier (WW)
- Elena (Liam’s wife): unaffected non-carrier (WW)
- Noah (son of Liam & Elena): carrier (Ww), unaffected — result of ww × WW
- Owen (Maya’s husband): affected (ww)
- Emma (daughter of Maya & Owen): affected (ww)
- Chloe (daughter of Maya & Owen): carrier (Ww)

If you want a printable/graphical pedigree, I can produce a clean PDF or an image version using these symbols and shading.