<p>i just don’t get how you know there were more recessive alleles in the gene pool. the monohybrid crosses matched perfectly with the 3:1 ratio expected. wouldn’t there have been more occurrences of red eyes or normal wings in the monohybird crosses?</p>
<p>Look at the cross:</p>
<p>BbWw x bbww</p>
<p>There are three recessive alleles for every dominant allele.</p>
<p>the final ratios were in a 10:10:1:1 ish ratio…</p>
<p>wait say that again? lol
I don’t think so unless I’m just missing something haha
in the first two crosses it’s basically AA x aa which will give you Aa
yes when you cross those Aa x Aa, you should get somewhere around 1/4 with recessive phenotype/genotypes as you said 3:1 ratio lol</p>
<p>^^ that’s exactly right!! 
or well something like that anyway hahaha</p>
<p>whoops sdfsdfdsfsdfsf</p>
<p>So, no linkage for Cross III?</p>
<p>Well now I’m confused. According to this: [Punnett</a> Square Calculator](<a href=“http://www.changbioscience.com/genetics/punnett.html]Punnett”>Punnett Square Calculator) … if you enter in the cross (BbWw x bbww), the genotypic ratio is 1:1:1:1 ???</p>
<p>Ninja: How not?
BB x bb = Bb offspring.
This shows that bronze eyes are dominant because each offspring has one of each allele, but expresses bronze eyes, meaning it must be dominant.</p>
<p>
Bb x Bb yields 3/4 bronze eyes (BB, Bb, Bb) and 1/4 red eyes (bb). The data table supports this.</p>
<p>The same thing happens with case II, except it’s with wings, not eyes.</p>
<p>I owned #1 and #2. #3 required some more thought. I got the following for #3:</p>
<p>Bronze eyes was dominant over red eyes
Stunted wings were dominant over normal wings
Bronze eyes was linked to stunted wings and normal wings were linked to red eyes
However, some rate of crossover was occurring between them
Then I answered 3-C, which was memorization. </p>
<h1>4 was almost too easy.</h1>
<p>Now that I think about it, I should have gone into more detail for all of them though…
And so begins the long wait til July…</p>
<p>Does anyone know when and if CB will release some scoring guidelines for the 2010 FRQs? It’d be really helpful.</p>
<p>lol. maybe im not good at explaining myself. sorry.</p>
<p>so I did the BbWw x bbww cross. That gives you a 1:1:1:1 expected ratio of all four phenotypes. now, in your post you said the almost 10:1:1:10 ratio was caused because there were more recessive alleles in the gene pool. i was just wondering how you knew there were more recessive alleles in the gene pool, given that the monohybrid crosses were giving a 3:1, normal ratio.</p>
<p>My convoluted reasoning for 3b: Because the phenotypes of the offspring didn’t deviate much from the F1 generation - I assumed they were linked. Some recombination occurred because some of the offspring did not express the phenotype of the F1 parents.</p>
<p>^well you probably made a 5 then hahaha
I only owned number 2 and 3 lol
number one…I think I got 2 out of 10 points
and maybe like 6 on number 4 haha</p>
<p>I think owned at not owning anything.</p>
<p>and that’s assuming I didn’t just screw it up and THINK I was doing it all right lol
I was pretty sure I had it right though…haha</p>
<p>Can someone please tell me what they think the answer to all parts of 4 are. I know what succession is but I still kind of guessed on all parts.</p>
<p>In addition to the fact that the genes are linked, in both of the Analyze questions I posited that the genes are not sex linked because the genders were evenly divided.</p>
<p>^</p>
<p>Do you think I lost a possible point for not saying that? Hmmmm</p>
<p>im just worried that i wasn’t specific enough on all the problems but i had down all the answers/ knew what was going on…blahhh 2 more months to wait.</p>
<p>@derek I doubt it.</p>
<p>I got the same thing ninjacat got "the expected ratio was definitely 9:3:3:1 (crossin WwRrxWwRr)
therefore, they were linked "</p>
<p>but other people like cirbelle said that because the cross was WwRr x wwrr then it was a 1:1:1:1 expected ratio??</p>
<p>Whats the right answer??</p>