The degree of relatedness between organisms or species can be estimated from the similarity of their DNA sequences, which often closely match their classification based on anatomical similarities.
Learning Goal 4
Most complex molecules of living organisms are built up from smaller molecules. The various kinds of small molecules are much the same in all life forms, but the specific sequences of components that make up the very complex molecules are characteristic of a given species.
For Grades: 9-12
Learning Goal 2
The sorting and recombination of genes in sexual reproduction results in a great variety of possible gene combinations in the offspring of any two parents.