What is locked-in syndrome?

Romano-Ward syndrome is an autosomal dominant disease that disrupts normal heart rhythms. The gene responsibl?

• Romano-Ward syndrome is an autosomal dominant disease that disrupts normal heart rhythms. The gene responsible for this syndrome is on chromosome 21. Heather has this syndrome (Rr) and Jerry does not (rr). They have a son Greg who has Down Syndrome (three chromosome 21s) but does not have Romano-Ward syndrome (his genotype is rrr). In which parent did the nondisjunction event occur? a. Mother b. Father c. either mother or father d. neither

• Answer:

  Neither. You need to read up about autosomal dominant genetics to understand the answer. Don't get people to do your homework for you. Read around your subject and ask your friends, teacher/lecturer for help if you're still unsure.