Genetic variation comes from several sources. Genetic variation comes from two main sources: mutation and recombination. â¢ Mutation A mutation is a random change in the DNA of a gene. This change can form a new allele. Mutations in reproductive cells can be passed on to offspring. This increases the genetic variation in the gene pool.
The medial collateral ligament (MCL) is a broad, thick band that runs down the inner part of the knee, from the femur (thighbone) to about four to six inches from the top of the tibia (shinbone).The MCL's primary function is to prevent the leg from over-extending inward, but it also is part of the mechanism that stabilizes the knee and allows it to ...
Collateral Ligaments. These are found on the sides of your knee. The medial collateral ligament is on the inside and the lateral collateral ligament is on the outside. They control the sideways motion of your knee and brace it against unusual movement.t is also vital to movement. Your knee ligaments connect your thighbone to your lower leg bones. Knee ligament sprains or tears are a common sports injury. In the past, injuring more than one knee ligament would put an end to future sports activities.