Punnett Squares

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.

The letters represent the alleles of the genes being crossed, with uppercase letters indicating dominant alleles and lowercase letters indicating recessive alleles.

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

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

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when two recessive alleles are present.

Codominance is a condition in which both alleles for a gene are fully expressed, resulting in offspring with a phenotype that shows both traits.

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a phenotype that is a blend of the two.

To calculate the probability, count the number of times a specific genotype appears in the Punnett Square and divide it by the total number of possible genotypes.

The probability is 50%.

The probability is 75%.