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 ...
There are four ligaments around the knee joint. A ligament is a tough strip of connective tissue that joins one bone to another bone around a joint. The knee joint ligaments help to stabilise and support the knee when it is moved into different positions. Each ligament has a different job to do: 1  The medial collateral ligament (MCL) is one of the ligaments on the side of the knee joint. 2  The lateral collateral ligament (LCL) is the other main ligament on the other side of the knee joint. 3  The anterior cruciate ligament (ACL) is one of the ligaments inside the knee joint.