A diploid organism that has two identical alleles for a given trait is called ___ for that trait. 23:40 Patterns Of Inheritance A diploid organism that has two identical alleles for a given trait is called ___ for that trait. a. homozygous b. heterozygous c. dominant d. recessive e. codominant Answer: a. homozygous Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+