Which of the following is true of long QT syndrome (LQTS)?

Which of the following is true of long QT syndrome (LQTS)? The genes involved in causing LQTS code for different proteins that make up the sarcomere (the contractile unit of a cardiac muscle cell) vulnerability to different triggers, such as physical activity, loud, sudden noises, and periods of rest or sleep varies with the genetic mutation.

A person who inherits a LOTS mutation will almost certainly develop symptoms such as; spells by early adolescence.

The mutation is highly penetrant. There are 10 different genetic mutations that cause LOTS in the general population