6.4 - Pedigrees

Front

How many alleles does a person carry for a trait?

Back

2

Front

What is the most likely genotype of the father if he has a dominant trait?

Back

AA

Front

Is Huntington's disease caused by a dominant or recessive trait?

Back

Dominant

Front

How many alleles does a child get from each parent for a trait?

Back

1

Front

In a pedigree, which shape represents a male?

Back

Square

Front

What is a pedigree?

Back

A diagram that shows the occurrence of a genetic trait in several generations of a family.

Front

What does a circle represent in a pedigree?

Back

A female.

Front

What is the purpose of a pedigree chart?

Back

To track the inheritance of traits and genetic disorders in a family.

Front

What does it mean if a trait is autosomal dominant?

Back

Only one copy of the dominant allele is needed for the trait to be expressed.

Front

What does it mean if a trait is autosomal recessive?

Back

Two copies of the recessive allele are needed for the trait to be expressed.