A child's sex is determined upon fertilization, when the female provides the X chromosome and the male provides _____. either the X or Y chromosome. From the following choices, select the type of inheritance in which multiple gene pairs combine to produce a particular trait.
1. To be a firefighter, you usually need a high school diploma and a college program in fire protection technology or a related program. You must pass physical agility, strength, fitness, and vision requirements. Previous experience as a volunteer firefighter may also be an advantage. 2.
Get the basic requirements. Firefighters must have a high school diploma and hold a valid driverâs license. Though firefighters must be 18 years old in order to work, limited on-the-job training can begin at a younger age. There may be a limit on age as well, usually between 28 and 30 years old.