Linked genes
What makes genes linked?
Being on the same chromosome. The closer, the more tightly linked.
What is a gene pool?
Do selection pressures cause mutation to occur? Why or why not?
No! Mutations are random, and the environment determines whether they are retained or lost due to whether they are beneficial or not.
What does 'heihei' mean?
Chicken
Hurricane Katrina?
More like hurricane tortilla!
If two genes are linked, is an individual more likely to inherit both alleles from one parent, or one allele from either?
Both from one.
What does allele frequency measure?
How common an allele is in a population.
What is a selection pressure?
What does 'oma' mean?
Run
I'm in me mum's car...
Broom broom
Get out me car!
Oh.
Which aspect of meiosis do linked genes affect, and how?
Crossing over - when genes are linked, crossing over has to occur between them for recombination of the alleles to occur.
If a certain trait is more beneficial than others to an individual in an environment, what will happen to its frequency in the population over time?
It will increase.
What characteristics does a population need to have for natural selection to occur?
It needs to be large and contain variation that means that some individuals are more suited to the environment than others.
Ko wai tō ingoa?
Ko ___ toku ingoa.
Road work ahead?
Uh, yeah, I sure hope it does.
What is a recombinant?
An individual who has a mix of parent alleles for two linked genes. I.e. those genes have crossed over during meiosis I.
What's the difference between different species and just normal diversity within a species?
The main one is isolated breeding - if two individuals can reproduce a viable offspring that can also reproduce, then they are the same species. Also behavioural patterns and the accumulation of variation.
Name and describe one type of natural selection.
Stabilising, disruptive, directional.
What day of the week is it today?
Rāapa
You think you just fell out of a coconut tree?
You exist in the context in all of which you live and what came before you.
What is the *overall* takeaway from linked genes? I.e. what does it mean at the population level?
It lowers genetic variation because there are fewer opportunities for recombination.
What's heterozygote advantage?
When heterozygous get the 'best of both worlds' by having both alleles. E.g. malaria protection and not having sickle cell disease.
Explain the 6 stages of natural selection
Large population, variation in population, preference for a certain trait, those without the trait die, those with the trait survive and reproduce, the trait is passed on to future generations and is established in the gene pool/increases in frequency.
Name 3 feelings in te reo
Māuiui, ngenge, hiamoe, hiakai, harikoa, hiainu, hōhā, koa, makariri, ora, tino pai, pōuri, riri, pukuriri, wera, pukumahi
Who are you playing with sweetie? Amanda.
Oh, who are you? I'm Amanda. I'm 6.