Punnett Squares Game

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 dominant and recessive alleles?

Back

Dominant alleles are expressed in the phenotype even if only one copy is present, while recessive alleles are only expressed if two copies are present.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a specific gene, such as Tt.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a specific gene, such as TT or tt.

Front

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

Back

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

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.

Front

What is the expected genotype ratio from a cross between two heterozygous parents (Tt x Tt)?

Back

The expected genotype ratio is 1 TT : 2 Tt : 1 tt.

Front

What is the expected phenotype ratio from a cross between two heterozygous parents (Tt x Tt)?

Back

The expected phenotype ratio is 3 tall : 1 short.

Front

What is an allele?

Back

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