HSC Bio Question! (1 Viewer)

[04er]

Hey guys!

I was going through the syllabus and came across the following dot point:

"Explain how mutations in DNA may lead to the generation of new alleles"



I have no idea how to answer this I have checked all my text books as well as HSC online... no luck! please help me!

Thanks for your time

 

[= Jennifer =]

what topic is this?

 

[t-i-m-m-y]

Originally posted by = Jennifer =
what topic is this?

Genetics: the code broken i believe; i don't think its blueprint

04er; please post in the appropriate sub-forum next time

 

[04er]

this dot point has been taken from "Blueprint of Life", section 4, point 4 under "Students learn to"

 

[xiao1985]

uhm..... i remember this... this is pretty random stuff...

*checkin notes*: (my notes r pretty, *cough* uhm, concise... to a pt where sometimes i dun even know wut does it mean... so bear with it yea?? =)... )

Mutation will change the DNA sequence of an organism. Since DNA sequences controls the production of protein, new DNA sequence will cause the new protein to be synthesised. In addition, since allele is the representation of the combination of proteins, varying the types of proteins produced lead to new alleles.

 

[04er]

oh ok... thanks xiao ... but its not very clear as you mentioned lol

 

[04er]

Hey,

I came across Telepathetic's answer for the dot point:

"When DNA replicates, the new cell usually have identical DNA to the parent cell. However sometimes mistakes occur; these mistakes are called mutations. Just one mistake can lead to the wrong amino acid being coded or even a malfunctioning gene produced. This (mutations) is a mechanism that can produce new alleles, because different proteins either structural or enzymic, may be produced in the cells."

Does this answer the question well? Because its a bit short Still, I like how Telepathetic has answered it. Perhaps I should add what sort of mutations occur? (i.e. deletion, substitution etc)?

 

[queenie]

yup

 

[t-i-m-m-y]

Originally posted by 04er
this dot point has been taken from "Blueprint of Life", section 4, point 4 under "Students learn to"

my mistake sorry.

 

[t-i-m-m-y]

alleles are DNA. when DNA changes. u get new alleles

 

[~*HSC 4 life*~]

Originally posted by 04er


I came across Telepathetic's answer for the dot point:

telepathetic to the rescue!

 

[04er]

lol cool thanks you guys! No worries Timmy... it was no big deal ^^

 

[jims]

if your looking for extra points, say that mutations can be good/bad/neutral and that only germatic mutations create alleles that are inheritable while somatic mutations are not.

 

[04er]

Originally posted by jims
if your looking for extra points, say that mutations can be good/bad/neutral and that only germatic mutations create alleles that are inheritable while somatic mutations are not.

Wow thanks Jims! That is awesome! VERY VERY good point!