Punnet Squares and Pedigrees

Front

What is incomplete dominance?

Back

A type of inheritance where the phenotype of the heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What is a dominant trait?

Back

A trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait?

Back

A trait that is only expressed in the phenotype when two copies of the allele are present.

Front

How are dominant alleles represented?

Back

By capital letters.

Front

What is heredity?

Back

The passing of traits from parents to their offspring.

Front

What is a Punnett square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What does a pedigree chart represent?

Back

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

Front

What is the purpose of a test cross?

Back

To determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

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