Pedigree Charts

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.

Tags

NGSS.HS-LS3-1

Front

How do you represent males and females in a pedigree chart?

Back

Males are represented by squares, and females are represented by circles.

Front

What does a filled shape represent in a pedigree chart?

Back

A filled shape indicates that the individual is affected by the trait being studied.

Front

What does an unfilled shape represent in a pedigree chart?

Back

An unfilled shape indicates that the individual is not affected by the trait being studied.

Front

How do you show marriages in a pedigree chart?

Back

Marriages are shown by a horizontal line connecting a male and female.

Front

What does a vertical line represent in a pedigree chart?

Back

A vertical line represents the offspring of the individuals connected by a horizontal line.

Front

What is a carrier in genetics?

Back

A carrier is an individual who has one copy of a recessive allele that does not manifest in their phenotype.

Front

How can you identify carriers in a pedigree chart?

Back

Carriers are often represented by unfilled shapes, but they have affected offspring.

Front

What is the significance of generation numbers in a pedigree chart?

Back

Generation numbers indicate the lineage and help track the inheritance of traits across generations.

Front

How do you denote the affected person in a specific generation?

Back

You denote the affected person by using the generation number followed by a hyphen and the person's number (e.g., II-5).