Official Jan. 27 SAT Biology Thread

<p>I put dish 1 too. and 36. Okay, good. </p>

<p>What else was there you guys? What about that experiment with the ledges? Pretty straightforward yeah?</p>

<p>Yeah for the last question on the ledges (with all medium width) is it just one species will go for the higher ones and the other the lower?</p>

<p>oh for the alcohol one. I put that the phenotype without wouldn’t be able to live/[do too well or something] if exposed to alcohol. I don’t know. I forget but I am pretty sure that was right…</p>

<p>Yeah that’s what I put for the last question on the ledges. Red was like the higher or something like that. Whichever went with that.</p>

<p>The one with the ledges reminded me of state standardized testing, haha :slight_smile: I don’t remember what I put but I can’t imagine anyone missing it…</p>

<p>For whoever’s asking: with the atoms, only 36 atoms participate because you have 6CO2 + 6H2O - 18 in CO2, 18 in H2O, 36 total. When the reaction takes place, they don’t change into different atoms; they just rearrange themselves.</p>

<p>And I put the control as one because the pad was sterile.</p>

<p>Okay so for the C6H12O6 one people were talking about before… It was that you couldn’t determine WHERE the atoms were right? As in isomers and stuff would be reason for that answer… yes?</p>

<p>Oh and the answers to the genetics ones? I can’t remember the exact thing. but it had to do with Black and short and brown and long or something?</p>

<p>Yeah, because glucose/fructose/whatever could either be an isomer, or straight, or in a ring, etc etc. For the genetics questions, black fur was dominant to brown, and I think short tails were dominant to long…the entire F1 generation was heterozygous for both traits.</p>

<p>Dominant = black and short tail. What were the other questions on that?</p>

<p>Okay good. I got that too. Wait was F1 heterozygous? I thought that was F2 that was heterozygous. I thought F1 was homozygous dominant/recessive… aah</p>

<p>Wait… no the parents were homozygous dominant/recessive, then F1 was heterozygous. If I do remember correctly…</p>

<p>The ratio was like 9:3:3:1 for F2. Can you tell if F1 would be heterozygous or homozygous?</p>

<p><a href=“http://sonic.net/~nbs/projects/anthro201/exper/9-3-3-1.html[/url]”>http://sonic.net/~nbs/projects/anthro201/exper/9-3-3-1.html&lt;/a&gt; </p>

<p>I think the 2 parents were homozygous…</p>

<p>Yeah… parents = homozygous (dominant and recessice)
F1 = heterozygous dominant
F2 = 9:3:3:1</p>

<p>one parent should be homo. dominant, the aother should be homo. rec.</p>

<p>ooh ****. ahaha. What about the amnion question. What did you put?</p>

<p>wait so saewhan you put hetero or homo?</p>

<p>I put yolk sac thing…
but i think the right answer is never dries up on terrresterial land…
i was confused between two…</p>

<p>and oh **** i meant both should be hetero. dominant</p>

<p>definitely put doesn’t dry up on terrestrial land, because yolk is nucleus, isn’t it? </p>

<p>for asexual reproduction, answer was A, parents can transfer their genetics without any recombination, which is an advantage in some cases.</p>

<p>I put yolk sac too… I was torn between the 2 as well.</p>