A dominant allele always results in the dominant phenotype.

Dominant Allele

In order to exhibit a recessive phenotype, an individual must be homozygous for the recessive allele.

Recessive Phenotype

Different versions of a gene are called alleles. Alleles can sometimes be classified as dominant or recessive.

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Genes are sequences of DNA that code for a particular trait. Genes affect both physical and psychological characteristics.

Gene

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

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