Pedigree/Genetics Review

Front

What is a pedigree chart?

Back

A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors, used to analyze the inheritance of traits.

Front

How are males represented in a pedigree chart?

Back

Males are represented by squares in a pedigree chart.

Front

How are females represented in a pedigree chart?

Back

Females are represented by circles in a pedigree chart.

Front

What does a filled circle represent in a pedigree chart?

Back

A filled circle represents an affected female.

Front

What does a filled square represent in a pedigree chart?

Back

A filled square represents an affected male.

Front

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

Back

A horizontal line between a square and a circle indicates that the individuals are married or in a partnership.

Front

What does a vertical line connecting a square and a circle represent in a pedigree chart?

Back

A vertical line connecting a square and a circle represents their offspring.

Front

What does a double line between two shapes indicate in a pedigree chart?

Back

A double line indicates consanguinity, meaning the individuals are related by blood.

Front

What is the significance of Roman numerals in a pedigree chart?

Back

Roman numerals are used to denote generations in a pedigree chart.

Front

What does a diagonal line through a shape represent in a pedigree chart?

Back

A diagonal line through a shape indicates that the individual is deceased.