Punnett Squares and Pedigrees

Front

What is the physical characteristic or trait of an organism? (Ex: Height, Hair color)

Back

Phenotype

Front

What does a horizontal line between a square and a circle represent in a pedigree?

Back

They are married ('together').

Front

What does an open circle represent in a pedigree chart?

Back

Not Affected Female.

Front

What is the genetic makeup of an organism usually represented by alleles? (Ex. AA, Aa, or aa)

Back

Genotype.

Front

If you cross two heterozygous tall pea plants (Tt), what fraction of the offspring will be tall?

Back

3/4.

Front

What is the term for an organism that has two identical alleles for a trait?

Back

Homozygous.

Front

What is the term for an organism that has two different alleles for a trait?

Back

Heterozygous.

Front

In a Punnett square, what do the letters on the top and side represent?

Back

The alleles of the parents.

Front

What is the purpose of a Punnett square?

Back

To predict the genetic outcomes of a cross.

Front

What does a filled circle represent in a pedigree chart?

Back

Affected Female.