Upon genetic analysis of the cancerous tissue, a mutated form of a gene, named the kid gene, was discovered in all affected individuals but not in the unaffected individuals. what is the most likely function of the normal, nonmutated kid gene? a. tumor-suppressor gene b. acetyltransferase gene c. proto-oncogene d. telomerase gene e. dna-repair gene

option A - tumor-suppressor gene

Explanation:

A cancerous tissue is growing or spreading rapidly at a harmful rate. However, for a tissue to become cancerous, its "internal guard" usually known as a TUMOUR SUPPRESSOR GENE must have lost or reduced its function.

This loss of function occurs after mutation.

So, definitely, all affected individuals with cancerous tissues have mutated tumour suppressor genes unlike unaffected individuals.

Note that other options are WRONG, because none of them accurately distinguishes affected from unaffected individuals

did you fail the test? xd