Mutations are sudden, random changes that occur spontaneously in the genetic make up of an organism. <em><u>Mutation are caused by various factors which includes errors in meiosis, and other factors such as chemical mutagens.</u></em>
<em><u>Germline mutations are types of mutations that occurs in the germline cells, cells that give rise to gametes, sperm and ovum.</u></em>
These types of mutations may be passed from the parents to the offspring, when a mutated sperm cells or ovum undergoes fertilization to form an ovum.
The tilt of the earth changing would affect the distance to the sun. This, the radiation from the sun, and resulting temperatures, would change as well.
They do not get infected with tetanus because they have already been vaccinated which means there are white blood cells and antibodies ready to fight tetanus.
Their immune system is safe because the antibodies won’t let them feel sick.