Asked in BiologyGeneticsCigarettes
Are all mutations bad for organisms?
Asked in Biology
Do all the mutations give the organisms an advantage?
Asked in Evolution
What is the major idea of evoulution?
Natural Selection: Random mutations occur within a population of organisms(living things). These mutations can be beneficial, deleterious(bad) or neutral. Organisms with deleterious mutations will be less likely to survive than the organisms with beneficial mutations. The organisms with the deleterious mutation die off as a result, and the organisms with the beneficial mutation live and reproduce passing on the beneficial mutation to their offspring. Over millions of years more and more changes occur until the original species has changed into a new species. This is an extremely gradual process.
Is 'mutations are beneficial to organisms' a true statement about mutations?
Asked in Natural Selection
How does natural selection help evolution?
Mutations are random... they can be good, bad, or neutral. Natural selection makes evolution a non-random process by making it more likely that organisms with bad mutations will die without mating, while those with good mutations will live on to pass the gene to the next generation making it more fit.
Asked in Genetic Engineering
Does Mitosis promote genetic variation in organisms?
What is the role of DNA in evolution?
DNA holds all the genetic code for the development of an organism. Mutations in the genetic coding causes traits in the organism to change. A change in environment allows the organisms with beneficial mutations to live on and pass on their genes to later generations while organisms with harmful mutations die off. Over time the organisms will have adapted to their environment, this is the process called Natural Selection.