YES! :) how did you get it??!!You have to knock out the first two because you never actually see P active, so there's no evidence for it being involved in that biochemical pathway.
YES! :) how did you get it??!!
Hey man! How did you get to the fact that P is first and M is the last in the pathway??
Hey I somewhat see where you are coming from hahaha! When you say ON enzyme working that means compound O to N right?I think the other explanations may be better. I haven't actually done this subject and misinterpreted the question :)
But choice C says enzyme converting N to O?
Legend! Thanks so much!
I followed your logic with another problem and I cant seem to get the right answer... Do you mind checking this one for me?
I'll give you a couple of hints to get you started with the crosses and the genotypes. If you still have trouble working it out I can post my answer up.
- You would have recognised these were reciprocal crosses. So you have to determine if the trait is sex-linked.
- For moths, butterflies, fish and birds the ZW notation is used instead of XY. For these animals, males are homozygous (ZZ) and females are heterozygous (ZW).
- In sex-linked crosses, if the male offspring of the two crosses have different phenotypes and the female offspring have the same phenotype, the trait is X-linked. If the female offspring have different phenotype and male offspring are of the same phenotype then ZZ or ZZ notation is used- a tip if you weren't sure if you should use XY or ZW
- Start off by drawing out the crosses:
Cross 1:F silver x M gold(Imagine an arrow pointing down)F gold M silverCross 2:F gold x M silver(Imagine an arrow pointing down)F silver M silver
Now fill in the Genotypes underneath each phenotype and work out what colour is dominant. Hint: look at the heterozygous offspring in cross 2.
It's really good that you are doing all these questions. It definitely would pay off ;)
turns out I just got the chromosome system wrong! I just got the answer! :PP thanks so much again!!!!!! :DDD
I was struggling over this question too but I had forgotten that moths had the different gametic composition, thanks for reminding me... makes sense now. :)
Just realised the MST is supposed to test us on our knowledge of Pracs 1 and 2. Do the Biology staff actually put questions relating to the pracs on the Genetics MST? D:
Just realised the MST is supposed to test us on our knowledge of Pracs 1 and 2. Do the Biology staff actually put questions relating to the pracs on the Genetics MST? D:
Thoughts on today's MST:
fuck youuuuuuuuuuuuuuuuuuuu Biology department
I studied all weekend but that was actually the worst thing :'(
I only got one of the practice questions wrong; the MST was significantly harder (but not in a straightforward way , it was just shittily designed so it didn't really matter how much of the theory you knew). That said, other versions might be much better? (I had Test C)
Nekk minute 100% mst :)
Is Paul Gleeson related/married to Dawn Gleeson? :o
Pretty random but im Kinda worried about mst reesults considering the average is apparently 5.6/10 :/That's brutal...
Hey all,
I emailed Dawn asking about the solution to Q22 of the Question Set in our Lab Workbook. She sent me the answer but I still don't understand!!!! Can anyone explain this, or can it not be explained any clearer than in the answer she provided? Things I don't understand:
- (Basic but I'm still confused) How does the 1:1:1:1 ratio occur in independent assortment with two gene loci. Isn't the ratio 9:3:3:1..?
- "Black class with 198 rabbits" ?????
- So what is the big B allele doing and what does it represent, and what is the big N allele doing and what does it represent?
It means that the genes are affecting the other genes. So in the presence of certain alleles, a particular phenotype is blocked.
http://bio1151.nicerweb.com/Locked/media/ch14/epistasis.html
QUESTION:
The agouti hair pattern often seen in many wild animals is characterised by a small band of light pigment near the tip of the hair. The width of this lightly pigmented band is genetically determined. Purebreeding agouti rabbits with a wide band at the tip of the hair were crossed to purebreeding rabbits with black fur. All of the offspring of this cross had agouti fur with the narrow band at the tip of the hair. These offspring were test crossed to purebreeding black rabbits.
The offspring of the second cross produced the following results:
phenotype number of offspring
black fur 151
agouti fur with the wide band 127
agouti fur with the narrow band 22
Propose a detailed genetic hypothesis to account for these results. Show clearly how you arrived at your conclusion.
ANSWER:
NB: because these rabbits are black you cannot see the band (epistasis) but it is a test cross which is always to the homozygous recessive so they must be bb nn
Cross is BbNn X bbnn
Looking at the results obviously the loci are not assorting independently (expect 1:1:1:1 ratio) so next simplest hypothesis is linkage. However there are only 3 phenotypes. Why? When the B allele is present it masks the effect of the band-width locus (epistasis) so the black class with 198 rabbits includes two groups; black and wide and black and narrow.
Looking at data, agouti with wide band is a non recombinant or parental class (high frequency and only one phenotype)
Allelic arrangement must be
B w
b W
(trans) in the heterozygous parent.
The proportion of recombinants (agouti narrow) bW/bw is 22
plus within the black fur class approximately 22 will be the other recombinant class (black, wide, Bw/bw).
Therefore the map distance is approximately (22 + 22) / 44 X 100/300 = 14.7
Thankyou... :)
the practice exam is pretty hard as well, i feel like i know nothing of protists and fungi :/
Also does anyone know if we have to learn the Genetic Code table of codons/amino acids?
Haha no way!
AUG is a good one to know though and maybe if you're keen the three stop codons
Cool man, just checking. Sweet.
So I tallied up the marks from the practice exam, and it looks like Dawn's component is slightly less than 50%, and Rick and Theresa have about 25% each. Hopefully it stays that way on the real exam, but it seems like a fair division of content to me.
What about her dreaded case studies?
Cystic fibrosis, Huntington's disease and beta thalassaemia.
For us, no
What do you mean here El?
Confused by "for us".
Do you mean for B Sci students we don't need to know about the case studies for the exam?
The demonstrators are constantly criticizing you guys during our biomed tutes, saying "don't get this wrong like the science students". I think its just appallingHappened during ours too. "Well let's hope you can do your genetics better than the science kids..."
Wow, I wasn't expecting the sample exam to be like that! The questions seem different to what we learnt? D:
B is definitely correct for the first one. I'm pretty sure that A is correct for flowering plants.
Lifecycle of hydra no idea,,,, if i had to guess it would be D, but no idea why...
Intracellular parsites? O_O ciliates? apicomplexa? plasmodium? LOL dunno
Protistan absorbers/recyclers found in forests --> Slime moulds- Ameoboid PRotists -->Ditcyostelids?
Don;t take my word for it though man! I hate this part of the course and I hate the animal kingdom content >_>
omg Rick's questions look horrible ;A;
I haven't looked at the practice exam yet so that was a rude shock
granted, I haven't revised any of Rick's content yet (planning to blitz his eight lectures tomorrow) but that is a bit nastier than I expected going off his super-simple questions last semester :(
Do we have answers for all of them?
Listen to Dawn Gleeson's voice at 150% speed. Be blown away by how different it sounds. Do it.
I am so curious as to what Levi and Nicola look like in real life. If you see me at REB on Friday, come say hi!! I'll be in a red shirt/lipstick, black skirt/stockings/hair and likely standing next to a tall man in plaid. I may or may not be holding 500 flashcards.
hobbitle, you need to do the proportion, not use the entire sample of attached/unattached - divide by 0.84 instead of 1 :)
Did you answer the question about determiniing the sex of an animal?
oh my gosh im in hysterics over tomorrow guys D': i dont even *recognise* the names of any of the homonids :'D debating whther or not sleep is a good idea tonight;;
+5000 respect for planning exam outfits in advance.
We would be great friends.
I threw you a curve ball and wore brown stockings instead of black ;c The hand of fate is fickle, I'm so sorry!!1!
And I tried guessing some of your faces at the exam. Were you wearing black sunglasses, jeans, maybe a hoodie, and have sandy hair, Nicola?
I threw you a curve ball and wore brown stockings instead of black ;c The hand of fate is fickle, I'm so sorry!!1!
Haha didn't you know that about Rick? It's why he's so obsessed with Protists.
Nah that wasn't me, I was seat 1519 near the toilets, I looked out for red shirt black tights but didn't take note of any brown tights :-P hehe
Human structure and function
Microbiology and Immunology
human Physiology
Genetics maybe?
Biochemistry and molecular biology
Maybe path? Or fundamentals of cell bio!
Woop woop ill be doing biochem and eng math + comp as well. ^^ though chances at ill take eng math over summer cause a matchless semester during the year will actually make my life.
HAHAHAHAHAHA OH MAN I CAN ABSOLUTELY NOT BRING MYSELF TO START STUDYING FOR ESD.
wuuuuuuuuuuut mechanics is my favourite module.
(Hi guys, BTW! A bit new around these parts... :P)
Hi and welcome! Another ESDer! I actually mostly liked it and am soooo glad I didn't take ESD1. I hear it blew.Hahaha, ESD1 sucked. Hard. And not because of my group. My group was great - still friends with them now.
The biology thread has turned into an Eng thread but at least Biol10005 is over now so hopefully mods won't mind.
HAIDEREIMMELISSAANDIMREALLYBADATLIFE.That took me sooo long to decipher! :P
LOLIKR. the ONLY way i can ever get my matlab codes to work is by tweaking them a bajillion times. and When i say tweaking, i dont mean like, fixing a typo i mean like deleting 90% of my code and trying again fifty times over. <//33 i got destroyed in the third programming assignment.Haha, programming on the exam is going to suck since we can't really press "run" on our exam papers to test it...
and his animations were not helpful in the slightest (though i must say i was impressed as hell by them)Very, very impressive animations. I didn't find Andrew too bad - Rao was much, much worse. Though maybe it's because Physics 1/2 makes ESD mechanics look quite easy by comparison.
<33 having moments with andrew ooi in a cow onesie.