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AS Biology Edexcel IAL Unit 1 & 2 2015

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And also, could some please explain to me how to draw a monohybrid cross... it's SOOO confusing!! Will I get marks if I draw a Punnett Square instead in the exam?

They're the same thing? Just remember that you have to explicitly state: the parent's genotype, the parents gametes, a key for what stands for what. And probably the parent's phenotype can't hurt.

Reply 41

PlayerBB

Original post by Adorable98

Where do I start counting? from 0?

No from 0.2 when it start to get steep and till 0.18 when is start to steep again this is one complete cardiac cycle

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Reply 42

PlayerBB

Original post by Adorable98

Where do I start counting? from 0?

No from 0.2 when it start to get steep and till 0.18 when is start to steep again this is one complete cardiac cycle and the difference is 0.98

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Reply 43

Adorable98

Original post by PlayerBB

No from 0.2 when it start to get steep and till 0.18 when is start to steep again this is one complete cardiac cycle and the difference is 0.98

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How's the difference 0.98?
0.2-0.18 = 0.02?

Reply 44

PlayerBB

Original post by Adorable98

How's the difference 0.98?
0.2-0.18 = 0.02?

Sorry 1.18*

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Reply 45

Adorable98

Original post by PlayerBB

Sorry 1.18*

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I see, Thanx! And good luck with today's exam! :h:

Reply 46

vaishpatel164

Original post by Adorable98

And also, could some please explain to me how to draw a monohybrid cross... it's SOOO confusing!! Will I get marks if I draw a Punnett Square instead in the exam?

yup u will get marks as long as the genotype and phenotype is correct

Good luck everyone !

Original post by vaishpatel164

yup u will get marks as long as the genotype and phenotype is correct

Okay, great thanx!

Reply 49

Adorable98

Why is A = atrioventricular valves closing ?? for AV to be closed the ventricles should have a higher pressure (ventricular systole), but u could clearly see that at point A, the left atrium has a higher pressure than the ventricles??

How did it go?

for me it was a little more difficult than the previous papers, but not too much. in my centre everyone had only 10-15 minutes left for checking, so the grade boundaries should be low

Reply 52

ab9826

Yeah i didnt have much time either, found it quite tricky overall

Original post by alauxjx

for me it was a little more difficult than the previous papers, but not too much. in my centre everyone had only 10-15 minutes left for checking, so the grade boundaries should be low