Pedigrees

What you see, or the physical appearance of an organism, is called the ---

• genotype.

• phenotype.

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

On a pedigree, this symbol represents a ---

• not affected female.

• not affected male.

• affected male.

• affected female.

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

• not affected male.

• not affected female.

• affected male.

• affected female.

How many individuals are there in the 3rd generation?

• 1

• 2

• 4

• 6

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

On this pedigree, the allele for curly hair is dominant. The couple labeled 2 both have curly hair, but have a daughter who does not have curly hair. Therefore, we can tell from the chart that for the couple labeled 2 -

• the male is heterozygous and the female is heterozygous.

• the male is homozygous recessive and the female is homozygous dominant.

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

How many generations are shown in this pedigree?

• 1

• 2

• 3

• 4