Question

how many individuals are affected (have the trait) in the pedigree below? 5 1 6 12

Explanation:

Step1: Identify the symbols for affected individuals

In a pedigree, typically filled - in symbols (like filled - in circles for females and filled - in squares for males) represent affected individuals.

Step2: Count the filled - in symbols

Looking at the pedigree:

• The first row has 2 affected individuals (one female and one male).
• The second row has 2 affected individuals (one male and one female).
• The third row has 1 affected male.

Answer:

5