mutations generate new alleles, alleles are different versions of the same gene
what is a phenotype?
refers to the set of observable characteristics of an individual
how can mutations lead to human evolution?
Most mutations do not affect the phenotype.
But if a mutation creates a new phenotype that is better adapted to environmental changes (than the rest of the population), the mutation is likely to spread throughout the population over a small number of generations.
For example, over time the size of the human brain has increased, as those born with a bigger brain were found to be at a survival advantage.
what is molecular formula?
The molecular formula shows the actual amount of atoms which make up a molecule
