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Inheritance is the process by which characters are passed from parent to progeny(child). The importance is that we could find
Variation is the differences between the progeny and parents.
They are important to all living organisms as it determines which traits are passed from parent to child.

Factors that's cause inheritance and variation are Mutations, the changes in the sequence of gene in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.

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Variation allows an individual to survive better than others. With variation an individual has a better chance to survive.

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Inheritance and variation is very important as INHRITANCE and VARIATION  is the mechanism by which offspring acquires some genetic characteristics from their parents.

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Inheritance and variation is very important as INHRITANCE and VARIATION  is the mechanism by which offspring acquires some genetic characteristics from their parents.

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Inheritance provides the code re-usability, like instead of writing the genetic code again and again we can simply inherit them.