Punnett Square Practice

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 genotype mean?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses for a particular trait.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait (e.g., DD or dd), while heterozygous means having two different alleles for a trait (e.g., Dd).

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present in the genotype.

Front

If a plant has the genotype 'Pp', what are the possible gametes it can produce?

Back

The possible gametes are 'P' and 'p'.

Front

What is the probability of getting a homozygous recessive offspring from a cross between two heterozygous parents (Dd x Dd)?

Back

The probability is 25%.

Front

In a Punnett Square, what does each box represent?

Back

Each box represents a possible genotype of the offspring resulting from the combination of alleles from the parents.

Front

What is the phenotype of an organism?

Back

Phenotype refers to the observable physical traits of an organism, which result from the interaction of its genotype with the environment.

Front

What does it mean if an organism is purebred?

Back

A purebred organism has a homozygous genotype, meaning it has two identical alleles for a trait.