Which term describes an organism that has identical alleles for a trait

The correct answer would be homozygous.

There are two types of combination of alleles in an organism:

Homozygous: An organism is said to be homozygous for a gene it carries two identical alleles of the gene. The homozygous can be of two types homozygous recessive (for example, rr, tt, yy) and homozygous dominant (for example, RR, TT, YY).Heterozygous: An organism is said to be heterozygous if it carries two different types of alleles for the gene. For example, Rr, Tt, Yy. Usually, the phenotype of the organism is the dominant trait.

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