Pedigrees

In a pedigree, what shape represents a male?

• circle

• square

What does a horizontal line between a square and a circle mean?

• They are siblings

• They are cousins

• They are married ("together")

• They are the children

What does a vertical line coming down from a square and circle that are connected by horizontal line indicate?

• They are cousins

• The children

• Aunts and Uncles

On a pedigree, this symbol represents a ----

• not affected male.

• not affected female.

• affected male.

• affected female.

On a pedigree, this symbol represents a ---

• not affected female.

• not affected male.

• affected male.

• affected female.

What do half colored symbols represent?

• The individual is a carrier (heterozygous).

• The individual expresses the trait.

• The individual has both recessive alleles.

• The individual has both dominant alleles.

How many generations are shown in this pedigree?

• 1

• 2

• 3

• 4

How many kids did the mother and father from the first generation have?

• 2

• 4

• 5

• 6

What is the mode of inheritance shown here?

• Recessive because it "skips" a generation

• Dominant because it shows up in every generation

In the second generation of this pedigree, how many people are carriers of the trait? *Remember: a carrier does not have the disorder/disease, but can pass it on to his/her children.

• 1

• 2

• 3

• 5