Radioactive substances in the environment
offspring
they didnt
the variations in genes, genes of sexually reproducing organisms will vary due to crossing-over of genes, mutations, and adaptations. In asexually reproducing organisms genes will vary through adaptations and mutations.
Mutations. They, when beneficial, provide variations of organisms genomes for natural selection. Beneficial mutations may confer a slight reproductive advantage to the organism so that genes " promoted " into the next generation change the allele frequency of the population causing evolution.
Pretty much the same process that causes mutations in any organism. The replication of the genetic code is not perfect and copying mistakes are made where one bases is substituted for another, or a whole string of bases is shifted in a frame shift. Google ' mutation. '
offspring
Usually mutations have deleterious effects to the organism, but occasionally there are beneficial mutations. Such mutations drive evolution.
mutations in dna can be advantageous and lead to charecteristics that help a person survive or increase it chances of survival.
Gene
An external agent that increases the rate of mutations of cells or organisms.
Yes they do. There are, of course, occasional mutations.
Certainly not, some mutations create novelty in the organisms.
Every life form is probably the product of accidental mutations! Nowadays mutations are not necessarily accidental--they are called genetically modified organisms (GMOs).
they didnt
Louis Pasteur
It can be a good indication because mutations affecting embryos are especially detrimental, and so such mutations accumulate less over time.
Yes. Mutations are random copying errors much of the time and that never stops because replication is not perfect.