Correct answer to Mondays #MCAT question is B! See explanation and recommended Firecracker review below. Any questions? Ask and well answer! B) According to the passage, the first conclusion that Mendel drew from his results was that, “1. Genetic units are passed unchanged to successive generations.” Mendel incorrectly hypothesized that genetic units are stable and cannot mutate, therefore they are passed unchanged to progeny. This hypothesis did not allow for genetic mutations to occur de novo, as is the case here. Explanation of incorrect answers: A) The gene that encodes “short” could be recessive to the gene that encodes “tall.” If both parental plants are heterozygous, than the progeny would be expected to be 75% tall and 25% short. C) Although this may appear to be due to wrinkled seeds and green seeds segregating together, this result could also occur if green and wrinkled are dominant to yellow and smooth. D) Similar to A, these plants can be heterozygous for green and yellow seeds. **** Review genotypes: https://med.firecracker.me/topics/2101
Posted on: Tue, 15 Jul 2014 16:07:34 +0000
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