Suppose a population of a new plant is found on an island. DNA sequencing determines that this plant shares a limited number of genes with plants on the mainland. Within the species, there is great genetic variability. This would suggest that
A) this plant species is very closely related to plants on the mainland.
B) DNA sequencing is unreliable for determining genetic linkages.
C) this new species is more closely related to animals.
D) this plant species has been isolated on the island for a long period of time.

Question

Quizplus · Accepted Answer

The limited number of shared genes with mainland plants and the high genetic variability within the species suggest that the plant species has been isolated on the island for a long period. This isolation could lead to genetic drift and the development of unique genetic characteristics, indicating a long-term separation from mainland relatives.

Suppose a Population of a New Plant Is Found on an Island