According to the biological species concept, for speciation to occur, ________.
A) the number of chromosomes in the gene pool must change
B) changes to centromere location or chromosome size must occur
C) large numbers of genes that affect numerous phenotypic traits must change
D) at least one gene, affecting one reproductive barrier, must change

Question

Quizplus · Accepted Answer

According to the biological species concept, for speciation to occur, at least one gene affecting one reproductive barrier must change. This could be a gene that affects mating behavior, fertility, or some other aspect of reproduction. The other options (A, B, C) are not included in the biological species concept for defining species.

According to the Biological Species Concept, for Speciation to Occur