AP BIOLOGY

Detailed explanation-1: -variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).

Detailed explanation-2: -Genetic variation-these are differences between individuals that are inherited from parents, such as the colour of your eyes, hair and skin. Environmental variation-these are differences between individuals that are not inherited but caused by the environment that the organism lives in, including scars and tattoos.

Detailed explanation-3: -Both environmental and genetic effects contribute to phenotypic variation within and among populations.

Detailed explanation-4: -Sometimes the environment changes a gene-either its DNA sequence or its activity level. Either of these effects can change the proteins that are made from a gene, which in turn affects traits. Some harmful environmental factors can change a gene’s nucleotide sequence. For example, UV radiation can break DNA strands.

Detailed explanation-5: -In some situations, genes play a larger role in determining your behavior; in other situations, environment plays a larger role in influencing your behavior. If you had a whole different set of experiences over your lifetime your genes may be expressed in different ways, and you may behave differently than you do now.