Pedigree

circle

A biological female

square

A biological male

line from male to female

These two organism were in a relationship

completely shaded

A person with the trait/disorder we are tracking

no shading

A person that does not have the trait/disorder and is not a carrier

Pedigree

What is this called?

4

How many generations are in this pedigree?

Individual III. B

Who would be the father of individual IV. A?

Female

What is the sex of individual I. B?

Pigment in skin

What is the phenotype of individual III. C?

(Aa) and (Aa)

What are the genotypes of the father and mother of the girl labeled as IV. A?

(AA or Aa) and (aa)

What are the genotypes of the grandfather and grandmother shown on this pedigree of the girl labeled as IV. A?

3

How many children did the married couple have in the 1st generation?

1

How many great grandchildren did the couple in generation 1 have?

5

How many individuals are there in generation 2 (II)?

Male

What is the gender of the first child born to first generation in this pedigree?

No pigment in skin

What is the phenotype of individual label as E in the 2nd generation?

Heterozygous

An organism that has two different alleles for a trait

Homozygous

An organism that has two identical alleles for a trait

Allele

Different forms of a gene

recessive trait

a trait that is apparent only when two recessive alleles for the same characteristic are inherited

dominant trait

A genetic trait is considered dominant if it is expressed in a person who has only one copy of the gene associated with the trait.

Genotype

An organism's genetic makeup, or allele combinations.

Phenotype

An organism's physical appearance, or visible traits.

Punnett Square

A chart that shows all the possible combinations of alleles that can result from a genetic cross

sex chromosomes

X and Y chromosomes.

homozygous recessive

Both alleles (factors) for a trait are the same and recessive (aa)

homozygous dominant

Both alleles (factors) for a trait are the same and dominant (AA)