What happens when chromosomes undergo the crossing-over process? I point
Portions of DNA information are switched between chromosomes, creating more
variation between the sex cells that are eventually created.
The chromosomes begin to separate into two new cells.
Chromosomes double to allow the normal number of chromosomes to be passed on
to each cell.
Each of the cells created splits into two new cells, creating 4 total, during Anaphase 1.

answer;

medical directors

explanation;

medical directors grants and supervises the privilege or permission to use an aed on an ambulance.

other roles of a medical director includes;

-provide medical leadership, including coordination with local ems and 911 centers.

-provide guidance in equipment selection and deployment

-develop guidelines for responder actions

-oversee medical care that is rendered through the program, including review of all responses to medical emergencies

-ensure appropriate initial training and skill maintenance

-assume overall responsibility for the conduct and operation of all patient care related activities