Understanding Family Trees and Cystic Fibrosis

Front

What does it mean if a disorder is recessive?

Back

It requires two alleles to be expressed.

Front

What is the genotype of a person with cystic fibrosis?

Back

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Front

What does a half-shaded shape in a pedigree represent?

Back

A carrier of the condition.

Front

What tool is used to predict the probability of genetic outcomes?

Back

Punnett square.

Front

What is a family tree also known as?

Back

Family pedigree.

Front

What is the definition of a genotype?

Back

The genetic constitution of an individual, represented by alleles.

Front

What is the definition of a phenotype?

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What does a fully shaded shape in a pedigree represent?

Back

An individual affected by the condition.

Front

What is the purpose of a Punnett square?

Back

To predict the genetic outcomes of a cross between two individuals.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous has two identical alleles, while heterozygous has two different alleles.