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 genotype mean?

Back

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

Front

What does phenotype mean?

Back

Phenotype is the physical appearance or observable characteristics of an organism resulting from the interaction of its genotype with the environment.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait (e.g., AA or aa), while heterozygous means having two different alleles for a trait (e.g., Aa).

Front

What does it mean if an allele is dominant?

Back

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

Front

What does it mean if an allele is recessive?

Back

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

Front

In a genetic cross, what does the term 'cross' refer to?

Back

The term 'cross' refers to the mating of two organisms to see how their traits combine in the offspring.

Front

What is the expected phenotype ratio from a monohybrid cross of two heterozygous parents (Aa x Aa)?

Back

The expected phenotype ratio is 3 dominant : 1 recessive.

Front

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

Back

The possible gametes are G and g.

Front

What is the purpose of using a Punnett Square?

Back

The purpose of using a Punnett Square is to visualize and calculate the probability of different genotypes and phenotypes in the offspring.