We let ygr represent the dominant allele for the

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dominant over the green. We let YGR represent the dominant allele for the green leaves and the ygr represent the recessive allele for the yellow-green leaf. The ANL represents the dominant allele for the purple color of the stem and the anl represents the recessive allele for the green color of the stem. The genotype and the phenotype of the parental generation are: P1: Green leaves, Purple stem (YGRYGR/ANLANL) P2: Yellow-Green leaves, Green stem (ygrygr/anlanl) When P1 X P2 are cross-pollinated, the offspring are heterozygous (ANLanl/YGRygr), they have different genotype from both parents but the same phenotypes (green leaves and purple stem) as that of the dominant parent. Punnett squares can also be used to predict the genotypes and phenotypes of offspring’s. Since our experiment dealt with a di-hybrid cross, the ratio was 9:3:3:1 of the F2 generation (Wisconsin Fast Plants 2014). Hypothesis: If the alleles for stem color and leaf color of a heterozygous F1 generation are self pollinated, then the phenotype of the F2 generation will be a 3:1 purple stem to green stem and 3:1 for green leaf to yellow-green leaf. If the alleles are independently assorted, when the F1 di-hybrids cross, then the F2 generation should have a 9:3:3:1 ratio of purple
stem/green leaf to purple stem/yellow-green leaf to green stem/green leaf to green stem/yellow leaf. Methods: Our experiment was carried out of a span of 14 weeks in which time we would grow both our F1 and F2 generation of plants. Our focus was on di-hybrids cross that show the F2 generation and we can use that to determine the actual phenotypes and genotypes in the F2 generation. The species of plant we would be using to study Mendelian genetic is Brassica rap a. These Fast plants are suitable for this experiment because they grow in a relative short time. P1 P2 Day 1: Place wick into each cell and then add some fertilizer pellets. Place the seeds into each assorted cell and then fill the cell to the top. Then apply some water to the cells to
moisten the soil and then label them and put them on the water mat and placed them under the light.

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