Abhisar
  • Abhisar
Let's see who can solve this c: A roan bull is bred to three cows. Cow A has the same genotype as roan bull. Cow B is red and cow C is white. What proportions of roan cows are expected in the offsprings of each group of cows. Answer Choices are 2,1,1 1,2,1 1,1,2 3,1
Biology
chestercat
  • chestercat
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anonymous
  • anonymous
with group of cows do you mean ofspring of 2 of the 3 cows? like AB AC and BC?
anonymous
  • anonymous
R is red, W is white and the genotype RW leads to roanness A:RWX RW: 25% RR 50% RW 25% WW B:RRXRW: 50% RW 50% RR C:WWX RW: 50% RW 50% WW so in every group half of the cows is roan
Abhisar
  • Abhisar

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shreehari499
  • shreehari499
But there's no option like that so wait..lemme try it
shreehari499
  • shreehari499
I think there's an involvement of codominance
shreehari499
  • shreehari499
WW- Red bull Ww- Roan ww- White
shreehari499
  • shreehari499
Ww(roan bull) * Ww (roan cow) We get WW,Ww,Ww,ww so the no. of roan bull is 2
shreehari499
  • shreehari499
2nd, Ww ( roan bull)* WW(red cow) We get WW and Ww so the ratio no.of roan bull is 1
shreehari499
  • shreehari499
3rd, Ww (Roan bull) * ww (White cow) We get Ww and ww Ratio of no of roan bull is 1
shreehari499
  • shreehari499
So the answer is 1 i.e 2:1:1
shreehari499
  • shreehari499
Is it correct @Abhisar ? I'll be back soon!
Abhisar
  • Abhisar
Yes, that's correct. Since the question is asking proportions.
Abhisar
  • Abhisar
@niels5x9 , your concept is correct.

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