AP BIOLOGY

HEREDITY

SEX LINKAGE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How are mutations passed on to offspring?
A
Any mutation that an organism acquires in its life can be passed on to the offspring through its gametes (sex cells)
B
Only mutations that occur *in the gametes* are passed on to the offspring
C
Mutations are not usually passed on to the offspring. A mutation stays within the original organism.
D
Mutations are not passed to offspring. They only occur within developing embryos.
Explanation: 

Detailed explanation-1: -If a mutation occurs in a germ-line cell (one that will give rise to gametes, i.e., egg or sperm cells), then this mutation can be passed to an organism’s offspring. This means that every cell in the developing embryo will carry the mutation.

Detailed explanation-2: -If a parent carries a gene mutation in their egg or sperm, it can pass to their child. These hereditary (or inherited) mutations are in almost every cell of the person’s body throughout their life. Hereditary mutations include cystic fibrosis, hemophilia, and sickle cell disease.

Detailed explanation-3: -The sperm and egg pass from parents to their children, so the mutation is inherited. You can’t inherit somatic mutations because they occur randomly in cells that aren’t the sperm or egg.

Detailed explanation-4: -Mutations can occur in any cell, but only germline mutations-those present in egg and sperm cells-can be transmitted to offspring. For instance, hereditary diseases are a subtype of genetic disorder that are caused by deleterious germline mutations.

Detailed explanation-5: -Germ-line mutations occur in gametes or in cells that eventually produce gametes. In contrast with somatic mutations, germ-line mutations are passed on to an organism’s progeny.

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