VCE Biology Question Thread

[Stressedyear11here]

Hi , im a year 11 doing bio 3&4 and im wondering if it is possible to achieve a 40+ study score or high 30's (38+) in biology. I got 76/100 fot unit 3 ..
Cheers

[Reus]

Hi , im a year 11 doing bio 3&4 and im wondering if it is possible to achieve a 40+ study score or high 30's (38+) in biology. I got 76/100 fot unit 3 ..
Cheers

You've still got unit 4 and the exam left mate! Definitely still possible to get a high 30 low 40. Especially if you're at the high end of your cohort 

[Stressedyear11here]

You've still got unit 4 and the exam left mate! Definitely still possible to get a high 30 low 40. Especially if you're at the high end of your cohort 

I got a 6/10 for my meiosis mitosis sac and im FREAKING OUT! but thank you for positive comment!

[dankfrank420]

Are you in a strong cohort? If you are, that 76 could easily scale up to 90+, which I think is enough to get a high 30.

[dankfrank420]

Has anyone had any SACS for unit 4? I'm having one this week on Meiosis/Inheritance, and apparently the school is trying to rush the SACs and finish unit 4 coursework by the end of the term... gives us more time to prepare for exams I suppose.

Also...

Why are offspring often produced in different numbers than the expected Mendelian ratios? (1:2:1, 9:3:3:1)

[nhmn0301]

Why are offspring often produced in different numbers than the expected Mendelian ratios? (1:2:1, 9:3:3:1)

I only know there might be chances of crossing over or linked genes that occur, which do not give you the expected ratio.

[Reus]

Has anyone had any SACS for unit 4? I'm having one this week on Meiosis/Inheritance, and apparently the school is trying to rush the SACs and finish unit 4 coursework by the end of the term... gives us more time to prepare for exams I suppose.

Also...

Why are offspring often produced in different numbers than the expected Mendelian ratios? (1:2:1, 9:3:3:1)

Yep, I had a SAC on mitosis towards the end of last term! Another in a weeks time, 3 more left after that and then the EXAM!! Our school also are rushing, hence why we completed one SAC already last term haha.

If the genes are linked the outcome generally has high numbers of parental offspring and low numbers of recombinant offspring (these are produced from gametes where crossing over occurred during meiosis).

[dankfrank420]

Thanks for the answers.

If the question stipulated that they were not linked, would an answer such as below suffice?

The fusion of parental gametes into a diploid zygote is a random process, and the ratios predicted by Mendel are only what theoretically what should happen. There is no way to accurately predict the number of each type of offspring, as it is a completely random process.

[soNasty]

does anyone have a quick method of determining F1 offspring gametes when given genotypes (eg SsBkBk x ssbkbk, bk/Bk stands for one trait)
answer is SBk, sbk, Sbk, sBk

[vox nihili]

does anyone have a quick method of determining F1 offspring gametes when given genotypes (eg SsBkBk x ssbkbk, bk/Bk stands for one trait)
answer is SBk, sbk, Sbk, sBk

Well the only gametes that ssbkbk can give you are sbk, so just add that to the possible combos for SsBkBk

[Stressedyear11here]

Are you in a strong cohort? If you are, that 76 could easily scale up to 90+, which I think is enough to get a high 30.

Strong cohort? Like, "smart" [my vocabulary isn't the greatest]? I think to myself that I'm average, but I know that if I really put my head down I can get a better score, like I did with some of my other sacs.

Also, would anyone recommend I start doing practice questions, I mean buy a book with practice questions, or am I better off getting a summary book? If so, which brand?

cheers everyone

[dankfrank420]

I was referring to how smart the students at your school doing biology would be. They stronger they perform on the exam, VCAA interprets that your SACs were hard and will mark your Unit 3 and Unit 4 SACs up to compensate for this.

As for books, I would recommend Biolnotes for summaries (they also have questions) and A+ for questions. You could by checkpoints, but those are just a collection of past exams you can find online at the VCAA website.

[Stressedyear11here]

I was referring to how smart the students at your school doing biology would be. They stronger they perform on the exam, VCAA interprets that your SACs were hard and will mark your Unit 3 and Unit 4 SACs up to compensate for this.

I think, moderate cohort.

[popoy111]

Hey guys,
Just wondering what are some reasons why Scientists may need to clone a gene?

[Stressedyear11here]

Hi, again.
I'm getting confused with test crosses...

So, it determines whether the genotype of the unknown dominant is heterozygous dominant or homozygous dominant. If homozygous dominant, 100% dominant and if heterozygous dominant then, 50% recessive and 50% dominant. How do I know which it is? That is, whether the unknown is heterozygous dominant or homozygous dominant?

Thank you