Pedigree

Front

What is a pedigree?

Back

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

Front

What does a filled circle represent in a pedigree?

Back

A filled circle represents an affected female.

Front

What does a filled square represent in a pedigree?

Back

A filled square represents an affected male.

Front

What does a horizontal line connecting a circle and square represent?

Back

A horizontal line connecting a circle and square represents a mating between a male and female.

Front

What does a vertical line leading down from a couple represent?

Back

A vertical line leading down from a couple represents their offspring.

Front

What does an open square represent?

Back

An open square represents a not affected male.

Front

What does an open circle represent?

Back

An open circle represents a not affected female.

Front

What do half-filled symbols represent in a pedigree?

Back

Half-filled symbols represent individuals who are carriers (heterozygous) for a trait.

Front

How can you identify carriers in a pedigree?

Back

Carriers are often represented by half-filled symbols, indicating they do not express the trait but can pass it on.

Front

What is the significance of generations in a pedigree?

Back

Generations in a pedigree help track the inheritance of traits over time, showing how they are passed from parents to offspring.