Final answer:
Genetic clines and morphological clines are related to the variation of phenotypic traits in populations across geographical gradients. A genetic cline refers to the change in allele frequency along an ecological gradient, while a morphological cline refers to the change in physical traits along the gradient. Both clines are influenced by gene flow and natural selection.
Step-by-step explanation:
Genetic clines and morphological clines are both related to the variation of phenotypic traits in populations across geographical gradients. A genetic cline refers to the gradual change in the frequency of certain alleles or genotypes along an ecological gradient. For example, in a species of bird, individuals with longer wings might be more common in populations living in higher altitudes. On the other hand, a morphological cline refers to the gradual change in physical traits of individuals along an ecological gradient, regardless of the underlying genetic factors. For instance, the size of flowers in a species of plant might increase as one moves up a mountain slope. Both genetic and morphological clines are influenced by factors such as gene flow and natural selection, and they help to reveal how populations adapt to their diverse environments.