DNA condensation of the duplicated chromosomes during cell division (mitosis or meiosis) results either in a four-arm structure (pictured to the right) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends.
Boyds Cave is a 0.7 mile moderately trafficked loop trail located near Bend, Oregon that features a cave and is good for all skill levels. The trail is primarily used for hiking, walking, and horses and is accessible year-round. Dogs are also able to use this trail but must be kept on leash. 0.7 miles 49 feet Loop.
Mammoth Cave National Park is one of the most well-known commercial caves in the country. Of course, visitors can only visit a tiny fraction of the 390 miles of mapped passage. The first known visitors to the Mammoth Cave system were native Americans who visited the underground passages at least 4,000 years ago. They explored the cave with torches, using the soft light of fire to illuminate the passages.