OCR 2010 A2 Biology Unit 2 - Control, Genome and Environment

I am in the same situation,three papers. 14 total in june. woot!

Just gotta learn about the wheat plant, then finished Mod 1, half way through Mod. 2 and still got 3 and 4 to go... niccce

Wow good luck with that! I only have 3

I just learned about the wheat today

Triticum aestivum is the artifically selected modern bread wheat consisting of the genotype AuAuBBDD. Both domesticated and wild wheat have contributed to this genotype. Wild wheats are diploid, and grasses can undergo polyploidy to hold more chromosomes within their nucleus. The resulting bread wheat is hexapolid 6n=48

First Wild Einkorn is domesticated by changing phenotype but not chromosome number to Einkorn-AuAu. This is bred with wild grass BB to from a sterile hybrid AuB. This undergos a mutation to double chromosome number AuAuBB.
This is then crossed with goat grass DD
Another sterile hybrid is produced of AuBD
Another mutation occurs to double chormosome number. To become AuAuBBDD---> Modern wheat!

I remembered...cool!

That was revision well done

I just learned about the wheat today

Triticum aestivum is the artifically selected modern bread wheat consisting of the genotype AuAuBBDD. Both domesticated and wild wheat have contributed to this genotype. Wild wheats are diploid, and grasses can undergo polyploidy to hold more chromosomes within their nucleus. The resulting bread wheat is hexapolid 6n=48

First Wild Einkorn is domesticated by changing phenotype but not chromosome number to Einkorn-AuAu. This is bred with wild grass BB to from a sterile hybrid AuB. This undergos a mutation to double chromosome number AuAuBB.
This is then crossed with goat grass DD
Another sterile hybrid is produced of AuBD
Another mutation occurs to double chormosome number. To become AuAuBBDD---> Modern wheat!

I remembered...cool!

That was revision well done

Anyone else using the OCR F215 book written by Richard Fosbery - www.amazon.co.uk/OCR-A2-Biology-Control-Environment/dp/0340958146

Mary jones here...

I just learned about the wheat today

Triticum aestivum is the artifically selected modern bread wheat consisting of the genotype AuAuBBDD. Both domesticated and wild wheat have contributed to this genotype. Wild wheats are diploid, and grasses can undergo polyploidy to hold more chromosomes within their nucleus. The resulting bread wheat is hexapolid 6n=48

First Wild Einkorn is domesticated by changing phenotype but not chromosome number to Einkorn-AuAu. This is bred with wild grass BB to from a sterile hybrid AuB. This undergoes a mutation to double chromosome number AuAuBB.
This is then crossed with goat grass DD
Another sterile hybrid is produced of AuBD
Another mutation occurs to double chormosome number. To become AuAuBBDD---> Modern wheat!

I remembered...cool!

That was revision well done

Sorry this is off the top of my head, but is it not 42? Cause I thought n was 7, not 8

Apart from that it's all right

Oops. Yes, thats just me being silly 7x8 =42 NOT 48

Ok. I don't even know what i'm typing anymore!

haha. I meant 7 x 6 =42! XD

Revision is making me tired...

Hey =}

Hellooo How are you finding the last unit then?

Not hard. =} apart from genetics which i didn't have a clue about earlier but got it sorted during easter, you?

Not hard. =} apart from genetics which i didn't have a clue about earlier but got it sorted during easter, you?

Nice!
Bad But there's still a while to go, so hopefully lots of revision and this thread should help

Not hard you say
Stop scaring me...

Well seeing that i have 14 exams in june .Why whats bad about genetics ? yes this thread will help us for sure. =)