Question

1. the pedigree below shows an example of how a dominant trait might pass through three generations of a family. fill in the table to complete a key that explains how to read the pedigree.

pedigree image

symbol	what it represents
square
vertical line
shading
no shading

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Explanation:

• Circle: In pedigree charts, circles typically represent females.
• Square: Squares in pedigrees represent males.
• Vertical line: Vertical lines connect parents to their offspring, showing the parent - offspring relationship.
• Shading: Shading in a pedigree symbol (circle or square) indicates that the individual has the dominant trait being tracked.
• No shading: No shading means the individual does not have the dominant trait.

Answer:

Symbol	What it Represents
Square	Male family member
Vertical line	Connection between a parent and his/her offspring (shows parent - offspring relationship)
Shading	Presence of the dominant trait in the individual
No shading	Absence of the dominant trait in the individual