LIFE SCIENCE

Detailed explanation-1: -Natural selection works on the phenotype of an organism because this is what interacts with the environment. The phenotype is the observable traits and physical qualities that help an organism survive in the environment. The genotype controls the phenotype by expressing proteins that create the observable traits.

Detailed explanation-2: -Natural selection acts directly on phenotypes and in directly on genotypes. Natural selection usually results in immediate increase in population variation. Natural selection leads to perfection of existing traits.

Detailed explanation-3: -Evolution is measured by changes in the genome, but natural selection does not act directly on the genome. Your genes do not change over the course of your lifetime, but natural selection can influence how well you do in evolutionary terms.

Detailed explanation-4: -While it may make sense that natural selection would act on the genotype, an organism’s genetic make-up, the action actually occurs on the phenotype, an organism’s physical traits.