Genetic load from mutations would make populations unviable (Talk.Origins)

Claim CB120:

The overall effect of mutations is to lower the viability of populations, due to the "genetic load," or genetic burden, that they add to the gene pool.

Source:
 * Morris, Henry M., 1974. Scientific Creationism, Green Forest, AR: Master Books, 56-57.

CreationWiki response:

This is a typical Evolutionist response: wave the magic wand of Natural selection and POOF! all harmful mutations go away. The simple fact is that Natural selection is just not that good at removing harmful mutations. In reality, it only removes the really dangerous ones, those that kill the organism before it can reproduce. As a result the harmful mutations that an organism can live with are not removed. Since most harmful mutations are of this type, they would just accumulate over time adding to genetic load.

Such calculations of mutation rate assume that all genetic variations are mutations. However, there are other sources of variations, including Mobile genetic elements, Natural Genetic Engineering, and Gene transference.

A carga genética de mutações tornaria as populações inviáveis ​​(Talk.Origins)