Questions 4 and 5 pertain to the following scenario: A gardener collects 66 tube
ID: 59730 • Letter: Q
Question
Questions 4 and 5 pertain to the following scenario:
A gardener collects 66 tubers from a single potato plant. They are all clones, with identical genotypes. She grows 22 in a plot with low nutrients, 22 in a very similar plot with medium nutrients, and 22 in a very similar plot with high nutrients.
In her low nutrient plot, 6/22 had white flowers-the others had purple flowers.
In her medium nutrient plot, 11/22 had white flowers, the others having purple flowers.
In her high nutrient plot, all had purple flowers.
4. Which of the following statements about this experiment are reasonable conclusions?
A) The difference in color was due to genetic causes
B) The white color was caused by a recessive allele
C) Because of the flower color difference, the potatoes were obviously not all genetically identical.
D) The differences in flower color were due to environmental causes.
E) A, B, and C
Imagine, now, that the same gardener found 66 tubers from a different potato plant. In this experiment, every potato produced only white flowers, no matter what plot in which it was raised.
5) Based upon BOTH experiments, which of the following statements are reasonable conclusions?
A) Flower color is due to genetic causes
B) The white color was caused by a recessive allele
C) Different genotypes exhibit different norms of reaction with respect to nutrients and flower colors.
D) The differences in flower color were due entirely to environmental causes.
E) None of the above.
Explanation / Answer
4)
In the given information, it is clearly stated that all the clones are of same genotype. Thus, the change in the color of flowers is not dependent on genes but is dependent on environmental factors. This is because all the 66 clones of potato tubers are grown in three different soils that contain varied concentration (low, medium, high) of nutrients.
Hence, the correct conclusion for the given experiment would be statement D.
5)
In the given case, all the 66 tubers grown in different nutrient concentration fields have given rise to white flowers. This indicates the color of the flower produced is irrespective of nutrients available in the soil. This condition is possible only when the color of flowers is dependent on genes.
Thus, based upon the experiment the correct statement among the following is A.
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