For the pea plants, if the red allele is dominant and the white allele is recessive, only two phenotypes are possible. Both the plants with red-red and ... Often, organisms will carry a dominant and a recessive allele of a gene. ... Homozygous means that the organism has two copies of the same allele for a gene. read more
Definition of Homozygous Dominant Many genes come in two versions: the dominant allele and the recessive allele. Since diploid organisms (like you and me) have two copies of each of our genes, we could have one of each allele and be heterozygous or have two of the same and be homozygous. read more
Video: Homozygous Recessive: Definition & Disorders Many disorders are homozygous recessive, from cystic fibrosis to albinism. Learn how a person (or a rat) can end up with two recessive genes and why this can cause genetic disorders. read more
Start studying Heterozygous, homozygous, dominant, recessive. Learn vocabulary, terms, and more with flashcards, games, and other study tools. read more