Read about phenotypic ratios and discover the difference between a phenotype and a genotype. Learn how to find phenotypic ratios using a Punnett square, and see phenotype ratio examples.

Learn about dominant vs recessive phenotypes. Compare and contrast dominant and recessive genes, and discover examples of recessive and dominant phenotypes.

The terms genotype and phenotype not only sound similar they are also closely related. Learn how an organism's genetic makeup -its genotype- affects its appearance or phenotype in this lesson.

Learn the definition of the Punnett square and how it's used to determine the potential genotype and phenotype of offspring. View Punnett square examples to aid understanding.

Learn about genotypic frequency calculation. Understand the difference between genotype and allele frequency. See examples of heterozygotes and homozygotes.

What is homozygous? Learn the definition, the meaning of homozygous recessive genotype, and what the difference between homozygous and heterozygous...

Codominance and incomplete dominance both produce the same genotype and phenotype ratios. If two heterozygotes are crossed, they both make one individual that looks like the parent and one mixed.

What is the difference between genotypic and phenotypic variation? A genotypic variation is a variation in the actual DNA sequence of a gene.

Explore whether natural selection acts on the genotype or the phenotype of an organism and why. Learn the definition of phenotype and its role in natural selection.

As part of this lesson, we will consider the difference between genotype and phenotype in terms of genetic inheritance and how genetic mutations can impact our risk for disease.