<p>oh, the father was affected? that explains why i got the right choice lol. i thought both parent’s weren’t.</p>
<p>bigbuddy, thats the hydrogen ion concentration, not the pH. they’re different.</p>
<p>Atropates: i said all of those things too but I skipped the bird one</p>
<p>ectoderm - nervous system and ttRr and TTRR crossed is 0 right?</p>
<p>Huntingtons is dominant and autosomal, so how do we know the father’s genotype? He could be heterozygous or homozygous dominant.</p>
<p>@someone-else</p>
<p>If he was homozygous dominant, then the answer would be 100%, but that wasnt an answer choice. so i guess you had to assume he was heterozygous dominant</p>
<p>Did anyone else not remember the “formula” for pH and put .0001?!?</p>
<p>And I put rainforest for the “most food” biome. </p>
<p>And was the tomato one virus? I’m hoping for anything in the 700’s.</p>
<p>seriously, grasslands vs. rainforest. I really believe it’s rainforest…</p>
<p>does anyone remember about xylem/phloem/the differentiating cells and what it means about the plant part? that they can serve as gametes? i don’t recall…</p>
<p>also, cell one and cell two. cell two is found in the ovary?</p>
<p>Ya cell 2 underwent meiosis while cell 1 only mitosis</p>
<p>Yes. Cell two IS in the ovary.</p>
<p>For tehe differentiating cells, it’s that the “unactivated” genes can be turned on/reactivated again. Or at least that’s what I put…</p>
<p>ichiruki: yes it was the ovary</p>
<p>really? genes? I didn’t think that had anything to do with it. I’m not sure about gametes either…</p>
<p>What about the tomato?? A virus?</p>
<p>Oops…THE* differentiating cells… haha</p>
<p>But that’s how you clone plants…by taking some cells in a growth medium so they “dedifferentiate” and then “redifferentiate.”</p>
<p>I remember all the other choices contained ‘genes’ though, so I believed those were wrong.</p>
<p>@scigirl, I remember it and I think its right, wasn’t it in the barrons?</p>
<p>For the huntingtons one I’m fairly sure it’s 75%.</p>
<p>All it said was that the father had huntingtons and the mother showed no history-thus, he could have been either Hh or HH, (H=huntingtons, h=none).
As the gene is autosomal dominant, a Hhxhh cross gives 50% w/ huntingtons and a HHxhh cross gives 100% huntingtons, so 75% is the right choice.</p>
<p>But you don’t average the two together. There is either a 50% chance or 100% chance and since 100 wasnt an option it has to be 50</p>
<p>guys - any ideas about the gametes/genes one?</p>
<p>also, the first question in the ecology section was the node labeled B right?</p>
<p>If you can have either a 100 or 50 percent chance, and each is equally likely, then it’s 75.</p>