Pedigrees

Front

What does a circle represent in a pedigree?

Back

A female.

Front

What does a square represent in a pedigree?

Back

A male.

Front

What symbol represents an affected male in a pedigree?

Back

A filled square.

Front

What symbol represents an affected female in a pedigree?

Back

A filled circle.

Front

What does a not affected male look like in a pedigree?

Back

An unfilled square.

Front

What does a not affected female look like in a pedigree?

Back

An unfilled circle.

Front

What is the purpose of a pedigree?

Back

To track traits in families.

Front

What does it mean if a trait skips a generation in a pedigree?

Back

It is likely a recessive trait.

Front

If person III-3 in a pedigree is gg, what does this indicate about their genotype?

Back

They are homozygous recessive.

Front

How can you identify carriers of a recessive trait in a pedigree?

Back

They will have an unfilled symbol but have affected offspring.