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 the term 'allele' mean?

Back

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

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 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 phenotype?

Back

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

Front

What is the genotype?

Back

The genotype is the genetic constitution of an organism, represented by the alleles it possesses.

Front

How do you represent a dominant allele in genetic notation?

Back

A dominant allele is typically represented by a capital letter (e.g., T for tall).

Front

How do you represent a recessive allele in genetic notation?

Back

A recessive allele is typically represented by a lowercase letter (e.g., t for short).

Front

What is the expected phenotypic ratio from a monohybrid cross of two heterozygous parents?

Back

The expected phenotypic ratio is 3:1 (dominant:recessive).