How can the human genome encode more proteins using the same number of protein domains? a. a genome duplication in the human genome doubled the number of proteins. b. genetic recombination occurs more frequently in humans than in invertebrates. c. a greater percentage of the human genome encodes proteins. d. humans have a higher mutation rate than invertebrates. e. the human genome uses more combinations of the same domains.

The correct answer is option E. "The human genome uses more combinations of the same domains".

Explanation:

The human genome can be regulated in different forms, one of them being that the protein domains can be combined in what is known as domain shuffling. This mechanism allows that the human genome can encode more proteins using the same number of protein domains. Domain shuffling is mediated by intronic recombination of exons. There is not enough evidence to known where and when this mechanism take places. However, scientific efforts have been made to identify the signatures that lead to domain shuffling.