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Can mutations add information in organisms?
mutations in dna can be advantageous and lead to charecteristics that help a person survive or increase it chances of survival.
What is the key factor that has led changes in organisms?
DNA mutations due to solar radiation
What are the limitations of keys and taxonomic system?
Mutations in an organisms' DNA alter its physical appearance
Why are DNA sequences more similar in more closely related organisms?
DNA sequences are more similar in closely related organisms because they share a common ancestor and have undergone fewer genetic changes over time. As organisms diverge and evolve, mutations accumulate in their DNA, leading to differences in their genetic sequences. Therefore, closely related organisms have had less time to accumulate mutations, resulting in more similar DNA sequences.
Has the structure of DNA changed over time?
Although there are three forms of DNA that have been discovered (A form, B form and the Z form), the structure of DNA itself is the same in all organisms. DNA may be packed differently or may contain additional chemical groups attached to the bases (like methylated DNA). However, the structure of DNA is similar in all organisms. This is the reason why it has been named the molecule of life.
How does an organism get variation?
Organisms can acquire variation through genetic mutations, which are changes in the DNA sequence. These mutations can occur spontaneously or be introduced through processes like recombination. Additionally, environmental factors can also contribute to variation by influencing gene expression and phenotype.
How does slow change over time occur genetically?
Through mutations in DNA, and natural selection of advantageous mutations.
What causes DNA variation in organisms?
Mutation of the genetic code causes DNA variation in organisms. For example, during DNA replication, one nitrogen base may be substituted for another, or an extra base can be added, or a nitrogen base can be skipped. If any of these mutations occur during the formation of gametes (sex cells), then the offspring that receives the mutation may have a genetic disorder.
What can cause changes in DNA sequences?
mutations
How is radiation created and what are its potential effects on living organisms?
Radiation is created through the decay of unstable atoms, nuclear reactions, or electromagnetic waves. When living organisms are exposed to high levels of radiation, it can damage cells and DNA, leading to health problems such as cancer, radiation sickness, and genetic mutations. Lower levels of radiation exposure can also have negative effects over time.
What is one way that changes can occur in a DNA sequence?
A radioactive carbon isotope can "convert" ... changing the chemistry of a codon.
Can mutations be passed through asexual reproduction?
Yes. This is how DNA works. A mutation is something that's different in the DNA. When an organism reproduces, it uses a either a whole or partial copy of it's own DNA, which passes on the mutation.
