Hello AN biology o/ ,
Im here back to ask questions because Im paranoid about wording. I have a ton of questions to be addressed. Fun times
Lets start with
DNA hybridisation, heres what I know, you guys help with if its unclear and what I could add on:
- DNA is isolated from two species of interest.
- DNA is then heated to 95*C(also important question. Whats the temperature? Pearson's book says 95*C) to break hydrogen bonds between strands.
- Isolate one strand from each species and mix them together( is the word 'mix' the best term to be used?)
- Cool the DNA until the strands reform hydrogen bonds with complementary bases.
- Reheat the DNA till all hydrogen bonds between strands are broken again and measure the temperature required to do so.
High temperature = more related , Low temperature = less related
How do fossils form? (Fossilisation )From my understanding:
- Death of organism
- Tissues and other soft body parts decay/decompose
- Sediments accumulate over the body preserving hard bodied parts.
What is natural selection? (Kinda looking for the perfect 1 line definition but idk if its possible lol)
Natural selection is the process by which the environment directly acts on the phenotype of organisms often choosing the most fittest in its environment and allowing it to pass on its traits.
Positives of selective breeding: I have one. I need 2/3.
- Selective breeding chooses for animals that are the most beneficial for humans and thus increase the efficiency of products.
Quick google search gives u
- It can create new varieties of good crops. : Isnt this the exact opposite? Since companies normally opt for crops that are similar and dont like variety?
- It helps eliminate diseases. : Idk about this, since selective breeding doesnt choose for the fittest organism and better immunity isnt really whats invested in. Companies also normally use antibiotics too sooo idk.
Rest feel like they say the same thing. Also this is the first seach that comes up so didnt look that deep lol
Last one. Check wording and if I mentioned everything lol.
Why are frameshift mutations so dangerous Frameshift mutations involve the addition/ deletion of a base rather than substitution. This results in changes to every codon after the mutation site as DNA is degenerate.
~Thnx o>