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 homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele is expressed in the phenotype even when only one copy is present, while a recessive allele is only expressed when two copies are present.

Front

What would be the phenotype of a plant with genotype PP?

Back

The phenotype would be purple, as purple is the dominant trait.

Front

If a purple-flowered plant (Pp) is crossed with a white-flowered plant (pp), what are the possible genotypes of the offspring?

Back

The possible genotypes are Pp (purple) and pp (white).

Front

What is the expected phenotypic ratio in a monohybrid cross?

Back

The expected phenotypic ratio in a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What does it mean if an organism is homozygous recessive?

Back

It means the organism has two recessive alleles for a trait, such as 'aa'.