In sporadic cases of retinoblastoma, only two gene mutations are thought to be necessary in the same cell for a tumor to develop. this happens when an organism inherits a mutant allele and a wild-type allele forms the parents. when the wild-type allele is mutated, resulting in tumorigenesis, this process is called, . metastasizingb. attenuationc. gain of heterozygosityd. loss of heterozygositye. recombination

D) loss of heterozygosity

Explanation:

In sporadic cases of retinoblastoma, only two gene mutations are thought to be necessary in the same cell for a tumor to develop. This happens when an organism inherits a mutant allele and a wild-type allele forms the parents. When the wild-type allele is mutated, resulting in tumorigenesis, this process is called loss of heterozygosity.

answer; i believe that the correct answer is (b) melosis; plz check first.good luck

a. the production of carbon dioxide through the process of photosynthesis