Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even when only one copy is present, while recessive alleles require two copies to express their trait.

Front

How is a homozygous genotype defined?

Back

A homozygous genotype has two identical alleles for a trait, such as AA or aa.

Front

How is a heterozygous genotype defined?

Back

A heterozygous genotype has two different alleles for a trait, such as Aa.

Front

What does phenotype refer to?

Back

Phenotype refers to the observable physical characteristics of an organism, determined by its genotype.

Front

What does genotype refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses.

Front

How are dominant alleles represented in genetic notation?

Back

Dominant alleles are represented by capital letters.

Front

How are recessive alleles represented in genetic notation?

Back

Recessive alleles are represented by lowercase letters.

Front

What is the purpose of a test cross?

Back

A test cross is used to determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.