Practice question

Question

Paralogs are genes that are the products of gene duplication events within a species. Orthologs are genes in different species that share a common ancestral gene. The figure below describes the evolutionary history of a hypothetical gene X in organism Y. This gene undergoes a duplication event. Later, Y splits into two species Y1 and Y2, and this gives rise to four copies of the gene - P, Q, R and S. Which option best describes the relationships between the four copies of the gene X? [Formula] Paralogs are genes that are the products of gene duplication events within a species. Orthologs are genes in different species that share a common ancestral gene. The figure below describes the evolutionary history of a hypothetical gene X in organism Y. This gene undergoes a duplication event. Later, Y splits into two species Y1 and Y2, and this gives rise to four copies of the gene - P, Q, R and S. Which option best describes the relationships between the four copies of the gene X? [Formula]