A current view of how the human and chimpanzee can share most of their nucleotide sequence 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 and proteins
D)environmental factors
E)adults but not immature phenotypes

Question

Quizplus · Accepted Answer

Many of the most important sequence differences between humans and chimpanzees are found in regulatory sequences and proteins, which control gene expression and ultimately influence phenotypic differences. Alterations in structural genes or repeated sequences alone are unlikely to account for the significant phenotypic differences observed between humans and chimpanzees. Environmental factors may contribute to variation, but sequence differences are heritable and can have a larger impact on phenotypic differences between populations. The option of "adults but not immature phenotypes" does not make sense in this context, as sequence differences are present from early development and are likely to influence phenotypes throughout the lifespan.

A Current View of How the Human and Chimpanzee Can