Answer: The P wave indicates atrial depolarization. The P wave occurs when the sinus node, also known as the sinoatrial node, creates an action potential that depolarizes the atria. The P wave should be upright in lead II if the action potential is originating from the SA node.
Explanation:
Answer: Males inherit only one X chromosome, so they show all traits on that one chromosome without another to mask them
Explanation: Males are born with XY Females are born with XX
All of the above should be the correct answer