- A somatic cell of a fruit fly usually has 8 chromosomes
- A fertilized egg cell is a kind of somatic cell
- Hence, a fertilized egg cell of a fruit fly will have 8 chromosomes

- A fertilized egg is formed by a sperm and an egg cell fusing together
- A sperm cell is a kind of sex cell
- An egg cell is a kind of sex cell
- Hence, a fertilized egg is formed by the fusion of two kinds of sex cells, a sperm and an egg cell

- A fertilized egg is formed by the fusion of two kinds of sex cells, a sperm and an egg cell
- Each sex cell provides half the number of chromosomes in a fertilized egg through sexual reproduction
- Therefore, the sperm and the egg cell will each provide half of the number of chromosomes in a fertilized egg

- A fertilized egg cell of a fruit fly will have 8 chromosomes
- The sperm and the egg cell will each provide half of the number of chromosomes in a fertilized egg
- 4 is half of 8
- Hence, the sperm and the egg cell each provides 4 chromosomes for the fertilized fruit fly egg

So, the sperm and the egg cell each provides 4 chromosomes for the fertilized fruit fly egg
Q: Chromosomes contain the genetic information of an organism. Fruit flies reproduce by sexual reproduction. Most of the cells of a fruit fly have 8 chromosomes. Which statement best explains the source of the chromosomes in a normal fertilized fruit fly egg?
Context:
- A fertilized egg is formed by a sperm and an egg cell fusing together 
- A somatic cell of a fruit fly usually has 8 chromosomes 
- Each sex cell provides half the number of chromosomes in a fertilized egg through sexual reproduction 
- A sperm cell is a kind of sex cell 
- 4 is half of 8 
- A fertilized egg cell is a kind of somatic cell 
- An egg cell is a kind of sex cell