Pedigrees

Front

What is a pedigree?

Back

A diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

Front

How many generations can a pedigree show?

Back

A pedigree can show multiple generations, often up to 4 or more.

Front

What is the purpose of using pedigrees?

Back

To track traits in families and make determinations about the inheritance of genetic conditions.

Front

What does 'aa' represent in genetics?

Back

It represents a recessive genotype.

Front

What does a dominant trait look like in a pedigree?

Back

A dominant trait typically appears in every generation.

Front

What is a carrier in genetics?

Back

An individual who has one copy of a recessive allele and does not exhibit the trait but can pass it on to offspring.

Front

How can you identify carriers in a pedigree?

Back

Carriers can often be identified by looking at the offspring of affected individuals.

Front

What does a filled shape represent in a pedigree?

Back

A filled shape typically represents an individual expressing the trait being studied.

Front

What does an empty shape represent in a pedigree?

Back

An empty shape typically represents an individual not expressing the trait being studied.

Front

What is the significance of the second generation in a pedigree?

Back

The second generation can show how traits are passed from parents to offspring.