A NEW HUMAN BEING IS CONCEIVED

“A new human being is conceived when a sperm fertilizes an egg. The sperm has 23 chromosomes and so does the egg. But the fertilized egg has 46, half from each parent, and is genetically unique. These 46 chromosomes, which are fixed at conception, establish the child’s sex and are a blueprint for how it will develop, both during pregnancy and after birth.” Science 

 

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