本题目来源于试卷: Continuity and Change D.10 Natural Selection，类别为 IB生物学
[单选题]
Evolutionary fitness is a term use8 dnxeeubq6iu7o02 i .pf;(bd d to describe adaptations. Which of the fo/kyglqg1 sl 4v)jlb31llowing best describes the t lskbvg4yq )l3 1g1/jlerm evolutionary fitness?
A. How effectively a phenotype attracts mates
B. The probability that a phenotype will be found in the next generation
C. How well a phenotype is suited to an environment
D. The underlying genotype is susceptible to mutations
参考答案: B
本题详细解析:
The evolutionary fitness of a phenotype is a measure for how many offspring will inherit the phenotype from their parents. (Choice B) Choice A is incorrect because although the attractiveness of a phenotype improves the chances of mating, this by itself does not guarantee that offspring will inherit the trait. Choice C is incorrect because although the suitability of the phenotype to the environment plays an important role in the survival of the individual, this by itself does not guarantee that the offspring will inherit the trait. Choice D is incorrect because mutations in the genotype would change the phenotype and it would be a new trait. Fitness of a phenotype is the frequency of how much we see this trait in the offspring unchanged.
| 
