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Name: Bronwyn
Status: student
Age: 16
Location: N/A
Country: N/A
Date: 2000-2001
Question:
When using Punnet Square, if a trait is homozygous how do you know to use 2 capital letters, or 2 lower case letters?

Replies:
There are no real set rules on this. Usually, homozygous recessive are lower case and dominant is upper. Co-dominant are usually expressed as upper case as well.

Steve Sample
York High School
Elmhurst, Illinois
60126

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