Pedigrees

Front

How many alleles does a child get from each parent for a trait?

Back

1

Front

What do half colored symbols represent in a pedigree?

Back

The individual is a carrier (heterozygous).

Front

In a pedigree, how many females have the hemophilia trait if 2 are affected?

Back

2

Front

Is Huntington's disease caused by a dominant or recessive trait?

Back

Dominant

Front

What does a not affected female symbol represent in a pedigree?

Back

Not affected female.

Front

What is a pedigree chart?

Back

A diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

Front

What does a filled symbol represent in a pedigree?

Back

The individual expresses the trait.

Front

What is the difference between a carrier and an affected individual?

Back

A carrier has one recessive allele and one dominant allele, while an affected individual has two recessive alleles or one dominant allele.

Front

What does it mean if a trait is recessive?

Back

The trait only expresses when an individual has two recessive alleles.

Front

What is the significance of generations in a pedigree?

Back

Generations help track the inheritance of traits over time.