Refer to the following scenario and then answer the questions that follow. A European species of marsh grass called Sparitina maritima has 2n = 60. A similar species native to North America, S. alterniflora, has 2n = 62. In 1835, the North American species was found growing near the European species near Southampton, England, having been accidentally imported. Occasional sterile hybrids were noted. In 1895, a new species, S. anglica, was first identified at Southampton and subsequently became very common. The new species has been identified as a fertile hybrid of the original two species.
-What is the 2n chromosome number of the new species, S. anglica?
A) 61
B) 122
C) 60
D) 62
E) 31

Question

Quizplus · Accepted Answer

The new species, S. anglica, being a fertile hybrid of the two original species with 2n = 60 and 2n = 62, would have a chromosome number that is the sum of the parent species' chromosome numbers, hence 2n = 60 + 62 = 122.

Refer to the Following Scenario and Then Answer the Questions