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 heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Aa).

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., AA or aa).

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles (e.g., AA, Aa, aa).

Front

What is a phenotype?

Back

A phenotype is the physical appearance or observable traits of an organism resulting from its genotype.

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

In a Punnett Square, what does each box represent?

Back

Each box in a Punnett Square represents a possible genotype of the offspring resulting from the combination of parental alleles.

Front

If T = tall and t = short, what is the phenotype of TT?

Back

The phenotype of TT is tall.

Front

If T = tall and t = short, what is the phenotype of tt?

Back

The phenotype of tt is short.