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puppylover72
puppylover72
06.06.2020 • 
Biology

Suppose a farmer is in the business of growing carnations for a local flower shop. He typically grows red hite, and pink flowers. In his carnations, flower color is determined by a single locus and two alleles. The flower color phenotype exhibits incomplete dominance, so all heterozygous flowers are pink. Homozygous flowers are either red or white The farmer would like the plants to produce enough of each color flower to meet customer demand which is conveniently the standard mendelian ratio of 1:2:1 of white:pink:red flowers. He hypothesizes this ratio can be obtained by letting the flowers self-cross. The farmer plants 1000 total seed of 250 white flowers 250 red flowers, and 500 pink flowers and lets the plants self-fertilize and perpetuate over three growing seasons. He predicts the ratio will remain the same each generation. Analyze the averaged collected data from the farmer's field trials and select the conclusion that best fits the farmer's results Traits Red White Pink Phenotypic 1/4 1/4 1/2 Ratio Observed 190 310 500 Expected 250 250 500 1. The farmer will meet demand because the flowers will reliably produce the 1:2:1 ratio of flower colors needed The ratio does not differ significantly from 1:2:1 O 2. The farmer will not meet demand because the flowers will not reliably produce the 1:2:1 ratio of flower colors needed. The ratio differs significantly from 1:2:1 3. The farmer will be able to meet demand because the observed and expected values of the pink flowers are equal, therefore the flowers should produce the necessary ratio through self-perpetuation4. The farmer will not be able to meet demand because a phenotype expressing incomplete dominance never produces the same color ratio.

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