Have you ever wondered and got an answer as to how each specie pass on its physical and other characteristics to its next generation?
by 
Brahmanyan
ANSWERS: 3
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In sexual reproduction chromosones cross over so that the offspring has DNA from both of the parents instead of being an identical copy of just 1
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It is usually a genetic 'error' that leads to a more viable species.
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Each species (note that the word 'species' is both singular and plural) passes on its characteristics genetically, i.e., the offspring have more or less the same genes as the parents. It's the genes, encoded in DNA, that control the growth and development of every organism. As others pointed out, there is some recombination of genes that differ between mother and father, and there are occasionally mutations that alter the genes spontaneously, but these are minor factors compared to the predominant sameness of the offspring's genome. This information has been known in great detail for the past 50-100 years.
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