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.
Prenatal development in humans.
Over nearly 30 years, humans removed many polar bears for a variety of reasons, from a population in
The most polygynous primates live in groups with many more females than males.
The continents were not always in their present positions. The position of the continents is importa
Oil pressure relief valves are spring loaded. The stronger the spring tension, the higher the oil ...
Structure of retroviral genomes in the integrated state