Please enable JavaScript.
Coggle requires JavaScript to display documents.
Variation and Evolution (Natural Selection (Darwin's Observations…
Variation and Evolution
Variation
-
-
sexual reproduction produces different combinations of alleles and, therefore, variation
Mutations
-
most mutations do not affect the phenotype, however a small number do. Within these, very rarely, a mutation may produce a phenotype that gives an organism a great survival advantage
Natural Selection
evolution: gradual change in the inherited characteristics of a population over time, this may lead to the formation of a new species
-
-
states that all species have evolved from simple life forms that first developed more than three billion years ago
-
-
-
Contrasting theories
Jean-Baptiste Lamarck's theory was based on the idea that changes that occur in an organism during its lifetime can be inherited
-