In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome 2 among our 46 chromosomes, whereas the other primates of this group have 48 chromosomes and any pair like the human chromosome 2 pair is not present; instead, the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?
A) The ancestral organism had 48 chromosomes and at some point a centric fusion event occurred and provided some selective advantage.
B) The ancestral organism had 46 chromosomes, but primates evolved when one of the pairs broke in half.
C) At some point in evolution, human ancestors and primate ancestors were able to mate and produce fertile offspring, making a new species.
D) Chromosome breakage results in additional centromeres being made in order for meiosis to proceed successfully.
E) Transposable elements transferred significantly large segments of the chromosomes to new locations.
A molecular model showing chromosome territories in the cell nucleus of humans
A taxonomic chart of the living primates.
Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania)
When parents actively support higher education, their children achieve more in their future careers.
Osmosis: Water moves from an area of low solute concentration to an area of higher solute ...
A typical distillation curve. Heavier molecules evaporate at higher temperatures and contain more ...