[srad0245]

What's the difference between homeobox and homeotic genes? Do Drosophilia have both?

[Lomas]

Isnt the normal ratio for a dyhybrid cross 93:1? or is it always different?

[plummango]

What does everyone need from this exam (to get into Uni, if you're going) ??!

[plummango]

(Original post by Lomas)
Isnt the normal ratio for a dyhybrid cross 93:1? or is it always different?

yeah its 9: 3: 3: 1

[Shhh.]

Any notes or help with genetic crosses and all that?? I really get confused! Also, any notes on conservation??

[Lomas]

(Original post by plummango)
Whats the real answer?

I got 32 ... it has to be that since you are crossing heterozygous with bbEe (thats a weird combination)

For that question i got 6 : 6 : 4, my answer is the same as yours but double everything! haha.. have i dont it wrong? or have you been tought to cancel down or something? really strange!

[Cyber123]

(Original post by plummango)
anyone else no where near finished revising???

I havent even learn the complete content yet let alone the past papers!!!

tell me Im not alone

I'm on the same boat as you, this content is intense!!!

[Mac.]

(Original post by plummango)
anyone else no where near finished revising???

I havent even learn the complete content yet let alone the past papers!!!

tell me Im not alone

I am terrified, I've made the mistake of putting F215 revision to late on. considering I have an exam tomorrow I doubt I'll be able to properly revise before hand.
I'm just hoping the fact I have perfected F214 will save me! Shame it's so small though!

[Princess Kawaii]

Whats the difference between conservation and preservation?

[Lalaa]

Define hemizygous

[Chris P Chicken.]

(Original post by plummango)
What does everyone need from this exam (to get into Uni, if you're going) ??!

A D will get me the B I need overall. I can't really get an A since I need 145/150 UMS minimum to get one overall which is impossible since I'm leaving revision till the day before the exam :l

[hjradley1]

(Original post by plummango)
What does everyone need from this exam (to get into Uni, if you're going) ??!

I need an A :/


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[Lomas]

(Original post by Lalaa)
Define hemizygous

Is that the same as homozygous?

[ZRO]

(Original post by Lalaa)
Define hemizygous

Homozygous is when both alleles are the same. For Example, if B codes for Brown eyes then BB, or bb will be classed as homozygous. Not sure wth hemizygous is so im just thinking you meant homozygous. Heterozygous is when the alleles are different. E.g Bb.

[Lomas]

Describe how ATP is provided for muscle contraction (there are 3 ways)

[hjradley1]

(Original post by Lalaa)
Define hemizygous

Hemizygous is only having one copy of an allele. So in humans makes are Hemizygous for sex linked genes found on the X chromosome as they only have 1 X


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[gibb]

(Original post by ZRO)
Homozygous is when both alleles are the same. For Example, if B codes for Brown eyes then BB, or bb will be classed as homozygous. Not sure wth hemizygous is so im just thinking you meant homozygous. Heterozygous is when the alleles are different. E.g Bb.

I think it is where only 1 allele is present, e.g X chromosome alleles in a male human.

[hjradley1]

Males*


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[Princess Kawaii]

(Original post by plummango)
What does everyone need from this exam (to get into Uni, if you're going) ??!

I need an A as it is...but if I do well in F214 next week I'd need a B from this.
To get an A overall for Pharmacy

How about u?

[ZRO]

(Original post by gibb)
I think it is where only 1 allele is present, e.g X chromosome alleles in a male human.

Oh. Didn't say anything about hemizygous in the OCR text book