Apopulation of lizards were living in an area that began to experience a great amount of mountain building. as the mountains formed some lizards were on one side of the mountains and the rest were on the other side of the mountains. over a period of many years the lizards were no longer able to breed, or had become different species. why did this happen?

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.