A current view of how the human and chimpanzee can share most of their nucleotide sequences yet exhibit significant phenotypic differences is that many of the most important sequence differences alter ________.
A) structural genes
B) the number of repeated sequences
C) regulatory sequences
D) environmental factors

Question

Quizplus · Accepted Answer

The most significant phenotypic differences between humans and chimpanzees can likely be attributed to alterations in regulatory sequences, which control gene expression and ultimately result in different developmental and physiological processes. Structural genes, which encode for proteins, are highly conserved between the two species. The number of repeated sequences may vary between individuals, but this is not likely to account for significant phenotypic differences between species. Environmental factors may play a role in shaping phenotypes, but they do not explain the genetic similarities and differences between humans and chimpanzees.

A Current View of How the Human and Chimpanzee Can