The Biological Question Thread

[stonecold]

The answers are correct. It is B.

I don't think so.

http://en.wikipedia.org/wiki/Coding_strand

The wording was probably incorrect then, but the working was correct.

ATT = coding strand
TAA = non-coding strand/template strand
AUU = mRNA
UAA = tRNA

How do you get your answer?

[stonecold]

technology evolution is just basically the evolution and advancement of technology eg genetic engineering.
cultural evolution is new characteristicss that arent transmitted by genes more towards socialising and may or may not be affected by technology as u mentioned its just the passing on of information.
thats what i understand of it anyway

I  just don't get their answer to question 6di on the 2009 VCAA exam...

[ivslt247]

The answers are correct. It is B.

I don't think so.

http://en.wikipedia.org/wiki/Coding_strand

The wording was probably incorrect then, but the working was correct.

ATT = coding strand
TAA = non-coding strand/template strand
AUU = mRNA
UAA = tRNA

How do you get your answer?

from your own link it says the non coding strrand acts as the template for tRNA and the template strand codes for codons. so in this case the TAA would result in the tRNA being AUU and mRNA beign UAA? :S

[stonecold]

The answers are correct. It is B.

I don't think so.

http://en.wikipedia.org/wiki/Coding_strand

The wording was probably incorrect then, but the working was correct.

ATT = coding strand
TAA = non-coding strand/template strand
AUU = mRNA
UAA = tRNA

How do you get your answer?

from your own link it says the non coding strrand acts as the template for tRNA and the template strand codes for codons. so in this case the TAA would result in the tRNA being AUU and mRNA beign UAA? :S

I think you are misinterpreting.  The coding strand will have the SAME sequence as mRNA codons, (accept T's substituted with U's) and the non-coding stand will have the same sequence as tRNA anticodons (accept T's substituted with U's)

[matt123]

QUESTION PLEASE

ok
so I know the ratio is 9:3:3:1 when 2 homozygous people have  a bang.

HOWEVER
when they linked
sometimes you see weird stuff like 3:1:1:3

why is this?
.

" SOMEONE PLEASE EXPLAIN IN EASY BIOLOGY TERMS .. "

[ivslt247]

when they are linked, they may have also gone through crossing over which results in recombinants. so new phenotypes will arise as u see the two smaller numbers represent the recombinants

[Russ]

Two homozygous people "having a bang" is not going to give you a 9:3:3:1 ratio, you'll get only one type of offspring irrespective of linkage/recombination.

Linkage changes the 9:3:3:1 ratio because it allows recombination, which alters the ratio/types of gametes.

[matt123]

Two homozygous people "having a bang" is not going to give you a 9:3:3:1 ratio, you'll get only one type of offspring irrespective of linkage/recombination.

Linkage changes the 9:3:3:1 ratio because it allows recombination, which alters the ratio/types of gametes.

Can you please explain "recombination"??

DO they HAVE to be LINKED to be crossed over?

[Russ]

Recombination is the process where paired chromosomes exchange content. So as they line up, you get a "crossover" as per this diagram.

For crossing over/recombination to occur, the two genes must be on the same chromosome but do not necessarily have to be linked.

[golden]

Recombination is the process where paired chromosomes exchange content. So as they line up, you get a "crossover" as per this diagram.

For crossing over/recombination to occur, the two genes must be on the same chromosome but do not necessarily have to be linked.

But aren't linked genes on the same chromosome?

[stonecold]

Recombination is the process where paired chromosomes exchange content. So as they line up, you get a "crossover" as per this diagram.

For crossing over/recombination to occur, the two genes must be on the same chromosome but do not necessarily have to be linked.

lol. vce definition of linked genes is genes that are on the same chromosome, do not assort independently and can undergo recombination.

[matt123]

Recombination is the process where paired chromosomes exchange content. So as they line up, you get a "crossover" as per this diagram.

For crossing over/recombination to occur, the two genes must be on the same chromosome but do not necessarily have to be linked.

lol. vce definition of linked genes is genes that are on the same chromosome, do not assort independently and can undergo recombination.

LOL i thought genes that link
ALL CROSS OVER

wait
does crossing over = recombination?

[masonnnn]

going over definitions to make sure i know everything and does anyone know;

Haplogroups
and
Theraputic Cloning

and just having a blonde moment -> what's the name of the non-template strand of DNA?

[matt123]

going over definitions to make sure i know everything and does anyone know;

Haplogroups
and
Theraputic Cloning

and just having a blonde moment -> what's the name of the non-template strand of DNA?

Ive never heard of halogroups and lol wtf is therapeutic cloning?

[ivslt247]

going over definitions to make sure i know everything and does anyone know;

Haplogroups
and
Theraputic Cloning

and just having a blonde moment -> what's the name of the non-template strand of DNA?

not sure about haplogroups...therapeutic cloning is fertilising eggs purely to make embryonic stem cells i believe.

scratch that. its using a somatic cell and taking its nucleus and inserting it into a donor egg so that the resulting stem cells are the same DNA as the patient so it doesnt cause rejection..a quick summary of it