Question

Orthologs differ from paralogs because?

1) paralogs are homologous genes that arise by gene duplication. Together they form a gene family.
2) paralogs are homologous genes separated by a speciation event (as opposed to homologous genes, produced by gene duplication, that are both possessed by the same species).
3) orthologs are homologous genes separated by a speciation event (as opposed to homologous genes, produced by gene duplication, that are both possessed by the same species).
4) a and c
5) none of the above

Answer 1

Orthologs and paralogs are types of homologous genes with orthologs divided by speciation and paralogs formed from gene duplication within a species; option 4) a and c is correct.

Step-by-step explanation:

Orthologs differ from paralogs in that orthologs are homologous genes separated by a speciation event, whereas paralogs are homologous genes that arise by gene duplication within the same species. Together, paralogs form a gene family. In summary, option 4) a and c is the correct answer because it combines the correct definitions of both orthologs and paralogs.