Punnett Squares and Heredity

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 it mean if an allele is dominant?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.

Front

What does it mean if an allele is recessive?

Back

A recessive allele is one that only expresses its trait when two copies are present in the genotype.

Front

What is the genotype for a homozygous dominant organism?

Back

The genotype for a homozygous dominant organism is represented as 'AA'.

Front

What is the genotype for a homozygous recessive organism?

Back

The genotype for a homozygous recessive organism is represented as 'aa'.

Front

What is the genotype for a heterozygous organism?

Back

The genotype for a heterozygous organism is represented 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 the probability of having a child with dimples if one parent is homozygous recessive and the other is heterozygous?

Back

The probability is 50%.

Front

What does it mean for an organism to be hybrid?

Back

A hybrid organism has two different alleles for a trait, meaning it is heterozygous.

Front

What is the purpose of a key in a genetic cross?

Back

A key in a genetic cross defines what each allele represents, helping to interpret the results.