Pedigrees

Front

What is a pedigree?

Back

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

Front

What does a square represent in a pedigree chart?

Back

A square represents a male individual.

Front

What does a circle represent in a pedigree chart?

Back

A circle represents a female individual.

Front

What is the purpose of using pedigrees?

Back

Pedigrees are used to track traits in families and make determinations about offspring.

Front

What does it mean if an allele is dominant in a pedigree?

Back

If an allele is dominant, it will express its trait even if only one copy is present.

Front

How can you tell if a person is homozygous or heterozygous for a trait in a pedigree?

Back

You can infer homozygosity or heterozygosity based on the traits of their offspring.

Front

What is the significance of the generation numbers in a pedigree?

Back

Generation numbers indicate the lineage and help track inheritance patterns across generations.

Front

How do you determine the relationship between individuals in a pedigree?

Back

You can determine relationships by analyzing the connections and lineage shown in the pedigree.

Front

What does it mean if two parents with a dominant trait have a child with a recessive trait?

Back

It indicates that both parents are likely heterozygous for that trait.

Front

What is the difference between a phenotype and a genotype?

Back

Phenotype is the observable characteristics, while genotype is the genetic makeup of an individual.