Punnett Square

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 a trait is dominant?

Back

A dominant trait is one that will appear in the offspring if at least one parent contributes a dominant allele.

Front

What does it mean if a trait is recessive?

Back

A recessive trait is one that will only appear in the offspring if both parents contribute a recessive allele.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

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 a homozygous genotype?

Back

A homozygous genotype has two identical alleles for a trait, such as TT or tt.

Front

What is a heterozygous genotype?

Back

A heterozygous genotype has two different alleles for a trait, such as Tt.

Front

What is the probability of an offspring being purple if both parents are homozygous dominant (PP)?

Back

100% of the offspring will be purple.

Front

What is the probability of an offspring being white if one parent is homozygous recessive (pp) and the other is heterozygous (Pp)?

Back

50% of the offspring will be white.

Front

What does it mean for an organism to be homozygous recessive?

Back

An organism is homozygous recessive if it has two recessive alleles for a trait, such as pp.