3 ms·

That's the understanding we'd get from a high school biology course, but it's not that simple.

avip 9y ago
[explain by example] Anemone colours table D => Dominant R => Recesive * => does not matter | Red | White | Purple | Result | | RR | * | * | RED | | D* | RR | * | WHITE | | D* | D* | RR | PURPLE | | D* | D* | D* | PINKISH | It's just as if everything they've taught us @school was wrong!
- gus_massa 9y ago
  Your table is wrong. When there is a dominant and a recessive allele, in the simple case you see only the effect of the dominant one. https://en.wikipedia.org/wiki/Dominance_(genetics) https://en.wikipedia.org/wiki/Dominance_(genetics) I'll try to fix your table, but I prefer to use white as the "default" color. I'm not sure about anemones. One possibility is that the color depend only of one gene that has three variants (alleles). * White (recessive): "w" * Red (dominant): "R" * Purple (dominant): "P" The table is: | Genes | Result | | ww | WHITE | | wR or RR | RED | | wP or PP | PURPLE | | RP | PINKISH | Other possibility is that there are two genes that produce the color. Each one has a dominant variant that produce the color and a recessive variant without effect. * White: default color, no gene for this * Red: "Y"es (dominant) -or- "n"o (recesive) * Purple: "Y"es (dominant) -or- "n"o (recesive) The table is: | Red | Purple | Result | | nn | nn | WHITE | | nY or YY | nn | RED | | nn | nY or YY | PURPLE | | nY or YY | nY or YY | PINKISH | Another possibility is the opposite case, that there are two genes that produce the color. Each one has a recessive variant that produce the color and a dominant variant without effect. * White: default color, no gene for this * Red: "y"es (recessive) or "N"o (dominant) * Purple: "y"es (recessive) or "N"o (dominant) The table is: | Red | Purple | Result | | yN or NN | yN or NN | WHITE | | yy | yN or NN | RED | | yN or NN | yy | PURPLE | | yy | yy | PINKISH | Or there can be one gene that has a dominant allele that produce color and other gene that has a recessive gen that produce color. Or two genes with three alleles, or more genes, or more alleles, or ... But in any of these cases, the sentence in the article makes any sense.
  - avip 9y ago
    One is wrong: either the table, or our "opinions" about genetics. The table is freely quoted from a well-known research done in my country during the 70's. However, I cannot find a reasonable reference to the original research, which should settle things. All I could find are citations of it in non-academic context. I'll try to contact the author and get my hands on the actual paper. Even if I can't cite that specific table... it's extremely easy to find other examples just by digging into dominance hierarchy examples. And there are 3 loci in the table, not 2.
    - gus_massa 9y ago
      I'd like to see a reference. I used only two to simplify. Let's try to see how your table looks after you kill all the purple/purplish nasty mutants! Anemone colours table D => Dominant R => Recesive * => does not matter | Red | White | Result | | RR | * | RED | | D* | RR | WHITE | In the second row, if Red is dominant and White is recessive, why the result is white? https://en.wikipedia.org/wiki/Dominance_(genetics) https://en.wikipedia.org/wiki/Dominance_(genetics) My first example is essentially equivalent to the AB0 group system. (White is 0, Red is A, Purple is B, Pinkish is AB.) A and B are dominant the lack of A and B is recessive. The AB0 is slightly more complicated, and mix some parts of my second example. https://en.wikipedia.org/wiki/ABO_blood_group_system#Genetics https://en.wikipedia.org/wiki/ABO_blood_group_system#Genetic...

avip 9y ago

[explain by example] Anemone colours table D => Dominant R => Recesive * => does not matter | Red | White | Purple | Result | | RR | * | * | RED | | D* | RR | * | WHITE | | D* | D* | RR | PURPLE | | D* | D* | D* | PINKISH | It's just as if everything they've taught us @school was wrong!

gus_massa 9y ago
Your table is wrong. When there is a dominant and a recessive allele, in the simple case you see only the effect of the dominant one. https://en.wikipedia.org/wiki/Dominance_(genetics) https://en.wikipedia.org/wiki/Dominance_(genetics) I'll try to fix your table, but I prefer to use white as the "default" color. I'm not sure about anemones. One possibility is that the color depend only of one gene that has three variants (alleles). * White (recessive): "w" * Red (dominant): "R" * Purple (dominant): "P" The table is: | Genes | Result | | ww | WHITE | | wR or RR | RED | | wP or PP | PURPLE | | RP | PINKISH | Other possibility is that there are two genes that produce the color. Each one has a dominant variant that produce the color and a recessive variant without effect. * White: default color, no gene for this * Red: "Y"es (dominant) -or- "n"o (recesive) * Purple: "Y"es (dominant) -or- "n"o (recesive) The table is: | Red | Purple | Result | | nn | nn | WHITE | | nY or YY | nn | RED | | nn | nY or YY | PURPLE | | nY or YY | nY or YY | PINKISH | Another possibility is the opposite case, that there are two genes that produce the color. Each one has a recessive variant that produce the color and a dominant variant without effect. * White: default color, no gene for this * Red: "y"es (recessive) or "N"o (dominant) * Purple: "y"es (recessive) or "N"o (dominant) The table is: | Red | Purple | Result | | yN or NN | yN or NN | WHITE | | yy | yN or NN | RED | | yN or NN | yy | PURPLE | | yy | yy | PINKISH | Or there can be one gene that has a dominant allele that produce color and other gene that has a recessive gen that produce color. Or two genes with three alleles, or more genes, or more alleles, or ... But in any of these cases, the sentence in the article makes any sense.
- avip 9y ago
  One is wrong: either the table, or our "opinions" about genetics. The table is freely quoted from a well-known research done in my country during the 70's. However, I cannot find a reasonable reference to the original research, which should settle things. All I could find are citations of it in non-academic context. I'll try to contact the author and get my hands on the actual paper. Even if I can't cite that specific table... it's extremely easy to find other examples just by digging into dominance hierarchy examples. And there are 3 loci in the table, not 2.
  - gus_massa 9y ago
    I'd like to see a reference. I used only two to simplify. Let's try to see how your table looks after you kill all the purple/purplish nasty mutants! Anemone colours table D => Dominant R => Recesive * => does not matter | Red | White | Result | | RR | * | RED | | D* | RR | WHITE | In the second row, if Red is dominant and White is recessive, why the result is white? https://en.wikipedia.org/wiki/Dominance_(genetics) https://en.wikipedia.org/wiki/Dominance_(genetics) My first example is essentially equivalent to the AB0 group system. (White is 0, Red is A, Purple is B, Pinkish is AB.) A and B are dominant the lack of A and B is recessive. The AB0 is slightly more complicated, and mix some parts of my second example. https://en.wikipedia.org/wiki/ABO_blood_group_system#Genetics https://en.wikipedia.org/wiki/ABO_blood_group_system#Genetic...