An organism that has two identical alleles for the same genetic trait is called as Homozygous .
Step-by-step explanation:
An organism which exhibits two identical alleles for the same genetic trait is said to be homozygous. They are pure bred traits. It is a genetic state where same kind of DNA sequence is inherited from both the parents. It might be a recessive trait or a dominant trait.
In case of a cross between allele (R)and allele (r) happens the resulting genotype might be RR, Rr or rr. Here the RR and rr are homozygous while the Rr are heterozygous. An allele depicts one particular form. Alleles are inherited from the parents.