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 do the letters T and t represent in genetics?

Back

T represents a dominant allele for tallness, while t represents a recessive allele for shortness.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the combination of alleles (e.g., TT, Tt, tt).

Front

What is a phenotype?

Back

A phenotype is the physical appearance or observable traits of an organism, such as height or color.

Front

What does homozygous mean?

Back

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

Front

What does heterozygous mean?

Back

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

Front

What is the difference between dominant and recessive alleles?

Back

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

Front

What is the significance of a recessive phenotype?

Back

A recessive phenotype appears only when an organism has two recessive alleles for a trait.

Front

How do you determine the genotype from a phenotype?

Back

You cannot definitively determine the genotype from a phenotype without further testing, as the same phenotype can result from different genotypes.

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 offspring inheriting particular traits.