Pedigree

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

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 half-filled circle represent in a pedigree chart?

Back

A half-filled circle represents a female carrier of a trait.

Front

What does a half-filled square represent in a pedigree chart?

Back

A half-filled square represents a male carrier of a trait.

Front

What is the significance of the horizontal line connecting a circle and a square in a pedigree chart?

Back

The horizontal line indicates a mating between a male and a female.

Front

What does a vertical line connecting a couple to a circle or square below represent?

Back

It represents the offspring of the couple.

Tags

NGSS.HS-LS3-1

Front

What is the genotype of an individual with two identical dominant alleles?

Back

The genotype is homozygous dominant (e.g., GG).

Front

What is the genotype of an individual with one dominant and one recessive allele?

Back

The genotype is heterozygous (e.g., Gg).

Front

What is the genotype of an individual with two identical recessive alleles?

Back

The genotype is homozygous recessive (e.g., gg).