Having a mutated gene ce30 on chromosome 3 that is expressed results in CEL dise

Question

Having a mutated gene ce30 on chromosome 3 that is expressed results in CEL disease. The gene ce30 undergoes imprinting in the paternal lineage. A father, Marvin, does not have the disease and does not have mutations in either copy of the ce30 gene. The mother, Jill, does not have the disease but does have one copy of a mutated ce30 gene. They carry out genetic testing on their unborn son and learn that the fetus has inherited one normal copy of ce30 and one mutated copy of ce30. Will this son have CEL disease?

A. No, because the mutated allele from the mother is methylated B. No, because the child will express both alleles C. Yes, because the child will only express the allele from the father D. Yes, because the normal allele from the father is methylated

Explanation / Answer

The correct answer is option D that is Yes, the son will have CELL disease because normal allele from the father is methylated because in paternal imprinting the case is reverse and the mother allele is expressed.

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