Question

With independent assortment of two genes affecting the traits wrinkled seeds (ww) versus round seeds (WW or Ww), green seeds (gg) versus yellow seeds (GG or Gg), what proportion of seeds from the cross WwGg \times WwGg is expected to be heterozygous for both genes? $\bigcirc \frac{1}{4} \times \frac{1}{4} = \frac{1}{16}$ $\bigcirc \frac{1}{4} \times \frac{1}{2} = \frac{1}{8}$ $\bigcirc \frac{1}{2} \times \frac{1}{2} = \frac{1}{4}$ $\bigcirc \frac{1}{4} \times \frac{3}{4} = \frac{3}{16}$ $\bigcirc$ None of the answer choices is correct.

          With independent assortment of two genes affecting the traits wrinkled seeds (ww) versus round seeds (WW or Ww), green seeds (gg) versus yellow seeds (GG or Gg), what proportion of seeds from the cross WwGg \times WwGg is expected to be heterozygous for both genes?
$\bigcirc \frac{1}{4} \times \frac{1}{4} = \frac{1}{16}$
$\bigcirc \frac{1}{4} \times \frac{1}{2} = \frac{1}{8}$
$\bigcirc \frac{1}{2} \times \frac{1}{2} = \frac{1}{4}$
$\bigcirc \frac{1}{4} \times \frac{3}{4} = \frac{3}{16}$
$\bigcirc$ None of the answer choices is correct.
        
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With independent assortment of two genes affecting the traits wrinkled seeds (ww) versus round seeds (WW or Ww), green seeds (gg) versus yellow seeds (GG or Gg), what proportion of seeds from the cross WwGg ×WwGg is expected to be heterozygous for both genes?
◯(1)/(4)×(1)/(4) = (1)/(16)
◯(1)/(4)×(1)/(2) = (1)/(8)
◯(1)/(2)×(1)/(2) = (1)/(4)
◯(1)/(4)×(3)/(4) = (3)/(16)
◯ None of the answer choices is correct.

Added by Concepci-N Y.

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Biology for AP Courses
Biology for AP Courses
Julianne Zedalis, John Eggebrecht
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With independent assortment of two genes affecting the traits wrinkled seeds (ww) versus round seeds (WW or Ww), green seeds (gg) versus yellow seeds (GG or Gg), what proportion of seeds from the cross WwGg x WwGg is expected to be heterozygous for both genes? (1/4) x (1/4) = (1/16) (1/4) x (1/2) = (1/8) (1/2) x (1/2) = (1/4) (1/4) x (3/4) = (3/16) None of the answer choices is correct.
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Transcript

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00:01 So here i went ahead and added a key for us so that we can reference the different alial.
00:08 So we know big r equals round, little r wrinkled, big y yellow, little y green, big t tall, little t dwarf.
00:15 And there is a typo right there.
00:17 Let me go ahead and correct that.
00:23 So this right here should be an f dwarf.
00:29 There we go.
00:30 So we're going to go ahead and look at what we're crossing.
00:33 So we're crossing parent a.
00:35 This is parent a over here with parent b.
00:40 So notice how we have three different letters that we're using in this case.
00:44 So the multiplication is a little more drawn out.
00:46 So when we multiply these, we have to make sure we go here, here, here.
00:53 And then we have to also go here, here, and here, here.
00:58 And we have to do that with both letters and all the letters.
01:01 So when we do that, this is the combo that we're going to get out.
01:04 Now notice how the first two letters here is big t, big t, they're the same...
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