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15 May 2019
In tomatoes, two alleles of one gene determine the character difference of purple versus green stems, and two alleles of a separate, independent gene determine the character difference of âcutâ versus âpotatoâ leaves. Please use the allele notation of G for stem color and P for leaf shape. The results for four matings of tomato plant phenotypes are as follows:
number of progeny with particular phenotype
mating parental phenotype green and cut green and potato purple and cut purple and potato 1 green & potato x purple & cut 197 202 195 206 2 Green & Cut à Green & Potato 197 199 0 0 3 Purple & Cut à Green & Cut 0 0 281 0 4 Purple & Potato à Purple & Potato 51 148 153 448
What are the most probable genotypes for the parents in each cross?
In tomatoes, two alleles of one gene determine the character difference of purple versus green stems, and two alleles of a separate, independent gene determine the character difference of âcutâ versus âpotatoâ leaves. Please use the allele notation of G for stem color and P for leaf shape. The results for four matings of tomato plant phenotypes are as follows:
number of progeny with particular phenotype
| mating | parental phenotype | green and cut | green and potato | purple and cut | purple and potato |
| 1 | green & potato x purple & cut | 197 | 202 | 195 | 206 |
| 2 | Green & Cut à Green & Potato | 197 | 199 | 0 | 0 |
| 3 | Purple & Cut à Green & Cut | 0 | 0 | 281 | 0 |
| 4 | Purple & Potato à Purple & Potato | 51 | 148 | 153 | 448 |
What are the most probable genotypes for the parents in each cross?
Reid WolffLv2
16 May 2019
