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Animation: Genetic Variation from Random Fertilization

by Pearson
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A sperm fertilizes an egg, producing a zygote. The random nature of fertilization adds to the variation arising from meiosis. Each parent is capable of producing a huge variety of genetically different gametes. The number of possible combinations among their offspring is staggering. Theoretically, one human couple is capable of conceiving a number of genetically different offspring that is far greater than the number of humans who have ever lived.
A sperm fertilizes an egg, producing a zygote. The random nature of fertilization adds to the variation arising from meiosis. Each parent is capable of producing a huge variety of genetically different gametes. The number of possible combinations among their offspring is staggering. Theoretically, one human couple is capable of conceiving a number of genetically different offspring that is far greater than the number of humans who have ever lived.