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AQA BIOL2 Biology Unit 2 Exam - 26th May 2011 watch

  • View Poll Results: Are you resitting this unit?
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    Lol sweet, I think I might be able to get 65 though O_O
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    (Original post by edebsi10)
    june 2010 can anyone tell me how they got 8 gametes for 'different types of gametes could be produced from this cell as a result of
    different combinations of maternal and paternal chromosomes' cell has 6 chromosomes?????? :/
    The gamete will have 3 chromosomes in it so you do 2 to the power of 3
    So basically 2x2x2 which is 8.

    For example, if the gamete had 6 chromosomes in you would do 2x2x2x2x2x2
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    (Original post by cherri3)
    I know right it makes you feel so stupid! Oh luck i have C2 in the morning tomorrow is going to be a looong day..
    I know, and when people say the answers to things and you didn't get that. Sucks bad. :p:

    Ouch. :hugs: I've got Ethics in the morning, I haven't revised it much at all, need to do some before I go to bed. Ah well it'll be done in 24 hours.
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    would anyone know what the raw mark for a b would be please??
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    So basically you can afford to lose 20 marks and still get an A?
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    (Original post by edebsi10)
    june 2010 can anyone tell me how they got 8 gametes for 'different types of gametes could be produced from this cell as a result of
    different combinations of maternal and paternal chromosomes' cell has 6 chromosomes?????? :/
    You need 1 of each type in the 2 daughter cells.

    Label them like this

    Type 1 version 1
    Type 2 version 2

    etc etc

    You can get:

    111
    112
    121
    122
    211
    212
    221
    222

    8 possibilities
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    and maybe the ums too please
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    I agree that 2 to the power of the number of chromosomes is easier btw I was just helping explain why ^^^^
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    Plant adaptations for water loss are stomata in pits to trap air. This reduces the water potential

    This is what is says in my notes. Water potential of what though???
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    (Original post by Twigleheight)
    The gamete will have 3 chromosomes in it so you do 2 to the power of 3
    So basically 2x2x2 which is 8.

    For example, if the gamete had 6 chromosomes in you would do 2x2x2x2x2x2
    thanks you made that soo simple basically 2 chromosomes in the previous question in each of the 3 cells two to tha power of three
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    (Original post by Kandy_Kain_94)
    So basically you can afford to lose 20 marks and still get an A?
    most of time its around 30 marks and u will get low A
    its harder than it sounds because u lose marks for lots of various things lol
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    (Original post by Jorgeyy)
    You need 1 of each type in the 2 daughter cells.

    Label them like this

    Type 1 version 1
    Type 2 version 2

    etc etc

    You can get:

    111
    112
    121
    122
    211
    212
    221
    222

    8 possibilities
    You could write them all out but what if they game you a larger number like 50.

    The correct answer is 2^(Number of chromosomes in haploid)

    So for humans it will be 2^23
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    (Original post by edebsi10)
    june 2010 can anyone tell me how they got 8 gametes for 'different types of gametes could be produced from this cell as a result of
    different combinations of maternal and paternal chromosomes' cell has 6 chromosomes?????? :/
    if you had A a B b C c, then there are 8 different ways they can be arranged, just by logic.
    you can have:
    ABC
    ABc
    AbC
    Abc
    aBC
    aBc
    abc
    abC
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    Do we need to remember the test for some things, like reducing sugars etc.?

    Thanks
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    (Original post by Jorgeyy)
    I agree that 2 to the power of the number of chromosomes is easier btw I was just helping explain why ^^^^
    Your explanation is good I hope a question like that comes up, I'll be like yesss! haha
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    (Original post by kingsmod1)
    most of time its around 30 marks and u will get low A
    its harder than it sounds because u lose marks for lots of various things lol
    So basically Im screwed. I got 30/60 for my ISA
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    (Original post by nasira372)
    You could write them all out but what if they game you a larger number like 50.

    The correct answer is 2^(Number of chromosomes in haploid)

    So for humans it will be 2^23
    Yea I posted after that I understood that method but I was trying to explain WHY to the guy that it occurs like that

    Thanks though, would be very useful if I didn't know ^^
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    Urgh.. Good luck guys. Really cba sitting doing an exam for 1hrs 45!
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    (Original post by nasira372)
    So basically Im screwed. I got 30/60 for my ISA
    Try doing an EMPA which you don't find out results for until summer !!

    Also, we only got 1 try because it's externally marked...
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    (Original post by edebsi10)
    thanks you made that soo simple basically 2 chromosomes in the previous question in each of the 3 cells two to tha power of three
    Make sure you do 2^(however many chromosomes in the gamete) and you'll get the answer You're welcome
 
 
 
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