Problem
You control the breeding of two animals - a male and a female - taken from the wild. You observe them over a period of several generations so that you know the pedigrees of all the resulting offspring animals. [This means you know unambiguously which individuals were the parents, grandparents, etc of which other individuals.] Let's call this original pair the "dynastic pair". You choose two animals from the third generation of this breeding population - grandchildren of the dynastic pair. These two chosen individuals do not share any common parents. You use the powerful new DNA sequence capabilities to determine the complete sequence of the genomes of each of these two individuals. Which of the following statements do you expect to best describe the results of this sequencing study?
A. One half of the genomes of these two individuals are identical. The other half shows the levels of variation (sequence difference) characteristic of any pair of copies of a gene taken at random from the population the original dynastic pair came from.
B. One quarter of the genomes of these two individuals are identical. The other three quarters shows the levels of variation (sequence difference) characteristic of any pair of copies of a gene taken at random from the population the original dynastic pair came from.
C. One eighth of the genomes of these two individuals are identical. The other seven eighths shows the levels of variation (sequence difference) characteristic of any pair of copies of a gene taken at random from the population the original dynastic pair came from.
D. One sixteenth of the genomes of these two individuals are identical. The other fifteen sixteenths shows the levels of variation (sequence difference) characteristic of any pair of copies of a gene taken at random from the population the original dynastic pair came from.