The original source of all genetic variation is mutation. Mutations are random changes in the DNA sequence that can be passed on to future generations. Mutations can be caused by many different things, including exposure to radiation or chemicals, or simply copying errors during DNA replication.
This error code happens because the DNA sequence is not what was expected. This can be caused by many different things, including mutations.
You are here because you have a question about:
- ______ is a source of genetic variation that refers to a random error in the genetic code.
- the original source of all genetic variation is _____.
Mutation is a process that can be used to fix the original source of all genetic variation. Mutation involves the substitution of one nucleotide (a molecule of DNA) for another. This process can occur randomly or as part of a natural process, such as the replication of DNA.
Recombination is the process by which two different chromosomes exchange genetic material. This can happen during meiosis, when the two sets of chromosomes are separated, or during mitosis, when the two sets of chromosomes are divided.
3. Sexual reproduction
Sexual reproduction involves the union of two gametes, usually a male sperm and a female egg. During fertilization, the sperm penetrates the egg and the two cells merge, creating a new organism with half of the genetic variation of the parent organisms.
4. Natural selection
One way to think about natural selection is to imagine a population of organisms with two different versions of a gene. The version that is more common in the population will be passed down to future generations. If the version of the gene that is more common in the population is better at helping the organism survive and reproduce, then the version of the gene will become more common in the population over time. This process of natural selection is what allows us to fix the original source of all genetic variation.
Still not working? maybe try one of these options:
- Genetic drift