nexttttt (4 Viewers)

[Justina]

hm with your first genetics question, the investigation one, i guess you could justify it by saying that it showed us the difference between linkage and non-lnkage? we came to the conclusion that crossing over significantly increases the possibility of greater variety in gametes. but i don't know if that addresses the whole justify thing. that word seems out of place i don't like it LOL. oh and maybe you could say something about how it encourages us to think about how crossing over isn't even considered in non-linked genes?

um and with the second genetics q. maybe could talk about how, although linkage maps were used early on in the first stage of the HGP procedures- genetic mapping- it only revealed to scientists the relative position of genes and not their absolute positions.

Makes sense - thanks =)
I'm going to need a bit more info for both though - i think i'll ask my friend when i next see her

 

[Kujah]

Ok, right - thanks for that =)

Another thing really quickly.....i know this is really basic, but can anyone sum up Sutton/Boveri's contribution - just something really brief and straight to the point.
I know it's to do with the Chromosomal theory of inheritence, but what is it and how did they come up with it?

- Homologous chromosomes come in pairs, with similar shapes, size etc etc, and are the means of inheritance.
- During gamete formation, the sex cells will receive one of these chromosomes.
- When fertilisation occurs, the resulting zygote has the full set of chromosomes.
- There must be hundreds of genes/traits on a chromosome to cater for the numerous characteristics.

 

[danz90]

The chromosomes/meiosis bit - yuck!

Yesss.... I hate it the most too! And the crap thing is, it comes in the exam every year.

what is the role of DNA polymerase in DNA replication? (this is for my own learning, lol)

DNA polymerase is an enzyme that is responsible for the arranging and pairing of complementary nucleotides found in the nucleoplasm (okizuki fragments i think they're called) to their corresponding nucleotide base, on a replication fork or single DNA strand that has been unzipped for replication.

SO think of it as a 'carrier' of these nucleotide fragments to the complementary nucleotide bases where they join onto to form a complete DNA molecule. The name 'polymerase' kind of gives a hint... polymerisation involves adding small molecules in order to make one large molecule. In this case, nucleotide fragments are added and joined to make up a whole replicate DNA molecule.

 

[dolbinau]

Thanks for polymerase help (lol enough answers for me to get the message)

Another thing really quickly.....i know this is really basic, but can anyone sum up Sutton/Boveri's contribution - just something really brief and straight to the point.
I know it's to do with the Chromosomal theory of inheritence, but what is it and how did they come up with it?

Sutton - observed meiosis in Grasshoppers, showed inheritence followed Mendel's experiements

Boveri - using sea urchins, proved a full set of chromosomes was needed for inheritence

Together formed the chromosomal theory of inheritence. (I think this is it in basic terms)

 

[Justina]

- Homologous chromosomes come in pairs, with similar shapes, size etc etc, and are the means of inheritance.
- During gamete formation, the sex cells will receive one of these chromosomes.
- When fertilisation occurs, the resulting zygote has the full set of chromosomes.
- There must be hundreds of genes/traits on a chromosome to cater for the numerous characteristics.

Sweet - thanks!

 

[gloworm14]

Ok, right - thanks for that =)

Another thing really quickly.....i know this is really basic, but can anyone sum up Sutton/Boveri's contribution - just something really brief and straight to the point.
I know it's to do with the Chromosomal theory of inheritence, but what is it and how did they come up with it?

sutton is the grasshopper testes dude.

and boveri is the sea urchin dude.

pretty much they found out that the factors(now known as genes) that mendel was talking about were located in the chromosomes which carry the units of inheritance.

 

[gloworm14]

question- whats the difference between cell differentiation and specialisation?

or are they pretty much the same thing?

 

[imqt]

an example of trangenic animal is.....(anyone?)

 

[gloworm14]

an example of trangenic animal is.....(anyone?)

is that like a mule, which is a cross between a female donkey and a male horse?
its advantage is that it is more robust and better for labour.
its disadvantage is that its sterile.

oh wait... thats a hybridisation. woops

 

[dolbinau]

question- whats the difference between cell differentiation and specialisation?

or are they pretty much the same thing?

I always thought they were the same.

an example of trangenic animal is.....(anyone?)

BT Cotton, RoundUp ready Soy Beans, OncoMouse

 

[gloworm14]

BT cotton isnt an animal
lol

 

[dolbinau]

is that like a mule, which is a cross between a female donkey and a male horse?
its advantage is that it is more robust and better for labour.
its disadvantage is that its sterile.

oh wait... thats a hybridisation. woops

Mule is a female horse +Male donkey. The other way around is a Hinny .

BT cotton isnt an animal

LOL *dies*. Oncomouse it is then.

 

[imqt]

is that like a mule, which is a cross between a female donkey and a male horse?
its advantage is that it is more robust and better for labour.
its disadvantage is that its sterile.

oh wait... thats a hybridisation. woops

no i think your right...isnt hybridisation, a method of creating a transgenic ANIMAL?

 

[gloworm14]

Mule is a female horse +Male donkey. The other way around is a Hinny .

are you sure?

omg.... http://en.wikipedia.org/wiki/Mule
ive been learning it the wrong way and the teacher hasnt said anything! omg!
lololol

 

[Kujah]

Salmon with Bovine Growth Hormone?

 

[imqt]

BT cotton isnt an animal
lol

yh i need an animal

 

[Kujah]

I think cell differentiation leads to cell specialisation, but they are pretty much interwined.

 

[gloworm14]

Salmon with Bovine Growth Hormone?

i think that's a good example of a transgenic species.

umm does that hormone make the salmon much bigger in size?

i think the teach made us watch a video of that once from what i remember.

 

[Kujah]

Enviropig is another example lol.

 

[gloworm14]

Enviropig is another example lol.

i have a mental picture of a green pig.

ohohoh!
how about glow in the dark green rabbits?
im not sure what the gene is, but it's from jelly fish.
i still dont know what the purpose is...