Pedigrees Quiz

What does it mean if a trait is autosomal?

• The trait is on one of the non-sex chromosomes

• The trait is on the sex chromosome X

• The trait is inherited from both parents

• The trait is only found in males

What is the genotype of an individual with the trait if it is recessive?

• TT

• Tt

• tt

• XX

What do circles represent in a pedigree?

• Females

• Males

• Affected individuals

• Breeding pairs

What type of inheritance does a pedigree demonstrate if the trait is equally distributed among both males and females?

• Autosomal

• X-linked

• Autosomal recessive

• X-linked recessive

What do we use pedigrees for?

• To look at families
• To make determinations about the offspring
• To track traits in families
• Nothing

In a pedigree, which shape represents a male?

• circle

• square

How many individuals are there in the 3rd generation?

• 1

• 2

• 4

• 6

The trait this pedigree traces is recessive because it skips a generation and individuals can be carriers. What is the most likely genotype for person III-3?

• GG

• Gg

• gg

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

• HH

• Hh

• hh

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

• 2
• 4
• 5
• 6