What is an organism that has two different alleles for a trait?
An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene. An organism which has two different alleles of the gene is called heterozygous.
the set of information that controls a trait; a segment of DNA on a chromosome that codes for a specific trait. an allele whose trait always shows up in the organism when the allele is present. an allele that is masked when a dominant allele is present.
- A physical attribute of an organism, such as hair color, height, color pattern, etc. A specific variation of a characteristic that an organism can pass on to its offspring through its genes.
- Genetics Vocabulary Quiz
A B phenotype An organism's physical appearance, or visible traits genotype An organism's genetic makeup, or allele combinations heterozygous Describes an organism that has two different alleles for a trait homozygous Describes an organism with two identical alleles for a trait
- The alleles that make up the genes of an organism, known collectively as a genotype, exist in pairs that are identical, known as homozygous, or mismatched, known as heterozygous. When one of the alleles of a heterozygous pair masks the presence of another, recessive allele, it is known as a dominant allele.
Updated: 24th September 2018