Hi there, I was wondering if someone could let me know if I did this right or not. Thanks in advance for any help.
So, the problem states the following:
We have crossed one flower with a corolla that is white and personé (the original question is not in English and I can't find a definition for personé anywhere, doesn't really matter I guess^^) with another flower which has a corolla which is red and has axial symmetry.
All the F1 offspring are pink and personé.
The F2 are as follows:
94 pink, personé
39 red, personé
45 white, personé
28 pink with axial symmetry
15 red with axial symmetry
13 white with axial symmetry
I am supposed to determine the number of genes and allèles for each trait and determine if the genes are linked or not.
I assumed at the beginning that there is partial dominance of either red or white and that personé is dominant over axial symmetry.
I used this nomenclature:
white corolla = w
red corolla = r
pink corolla = r/w
personé = p+
axial symmetry = p
For the first cross my punnet square got individuals who all have the genotype
r/w, p+/p, which is in line with what the problem states at the beginning.
For the second punnet square, I put the following chromosome donations at the top: r,p+----r,p----w,p+-----w,p. I put the same ones on the side too.
The theoretical results I got are the following:
pink, personé: 6/16
red, personé: 3/16
white, personé: 3/16
pink, axial: 2/16
red, axial: 1/16
white, axial: 1/16
After doing a chi squared test, the results are confirmed to be close enough to the observed. So I concluded that there are
two genes,
one with three alleles, the other with two alleles. And finally, that the genes are not linked because we do not note a higher than expected proportion of the parental type.
Thanks so much for any and all help!
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