Question

Hereditary retinoblastoma is an autosomal dominant hereditary cancer. Cells from retinal tumors in a child who has this disease possess________.A. evidence of non-disjunction in all autosomes.B. one non-functional copy of the retinoblastoma gene.C. two non-functional copies of the retinoblastoma gene.D. trisomy for the retinblastoma gene.E. a dominant mutation in the retinoblastoma gene.

Answer 1

Answer:

C. Two non-functional copies of the retinoblastoma gene.