Which state best describes the diffrence between a gene and a allele

Rue or false siblings look simila rbecause they each have some traits of their parents.

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.