Question

Gene genealogies can vary for different loci. What does this imply for species trees? Group of answer choices
A) Adaptive radiations do not occur.
B) Species trees should be constructed using multiple loci (both nuclear and mtDNA).
C) All genes in the genome are subject to similar selective pressures.
D) Species trees require apomorphies in order to be successfully resolved.
E) Accurately estimated gene trees will always give the correct species phylogeny.

Answer 1

Answer:

The correct answer is option B) "Species trees should be constructed using multiple loci (both nuclear and mtDNA)".

Explanation:

Gene genealogy is defined as the inference of relationships between individuals by using DNA testing in combination with the analysis of traditional genealogical and historical records. Gene genealogies could not be established using an unique genetic loci, since not always the same loci vary among individuals. Therefore, species trees should be constructed using multiple loci (both nuclear and mtDNA), to avoid erroneous inferences obtained by analyzing loci that do not vary among individuals.