In this example, the contemporary population size is five, and the sample size is two. The sample
and all its ancestors are traced backward in red. The MRCAs of the sample and of the population are solid red and blue
circles, respectively.
Homework:
Identify the MRCA of all pairwise combinations of
samples.
Homework:
The textbook figure below contains at least two errors.
Identify and explain why they are errors.