fertilization is when a sperm and an egg are fused together & fertilization is when an egg cell becomes fertilized ->  a fertilized egg is formed by a sperm and an egg fusing together  a fertilized egg is formed by a sperm and an egg fusing together & each sex cell provides half the number of chromosomes in a fertilized egg through sexual reproduction ->  a sperm and an egg each provide half of the number of chromosomes in a fertilized egg through sexual reproduction  a sex cell of a human contains 23 chromosomes & a sperm is a kind of sex cell ->  a sperm of a human contains 23 chromosomes  a sex cell of a human contains 23 chromosomes & an egg cell is a kind of sex cell ->  an egg cell contains 23 chromosomes  a sperm and an egg each provide half of the number of chromosomes in a fertilized egg through sexual reproduction & a sperm of a human contains 23 chromosomes & an egg cell contains 23 chromosomes ->  a fertilized egg will get 23 chromosomes from the sperm and 23 chromosomes from the egg  a fertilized egg will get 23 chromosomes from the sperm and 23 chromosomes from the egg & 23 plus 23 equals 46 -> a fertilized egg will have 46 chromosomes