Huntington's disease (hd) is a neurodegenerative genetic disorder involving an autosomal dominant mutant allele with high penetrance. if a father's mother had hd, what is the probability that his first child will also have hd?

100% the child will also have HD, as HD is caused by the DOMINANT mutant allele. 4/4

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.