Final answer:
Using the given chromosome numbers, the calculated chromosome number for a grizzly bear would be 14 based on the hybrid gruffalo's chromosome count. However, the correct somatic chromosome number for a grizzly bear is actually 74, which indicates there may be a typo in the question as no such option is provided.
Step-by-step explanation:
The somatic chromosome number of buffalo is given as 60, and we know that the hybrid gruffalo has 67 chromosomes. Since hybrids typically have a chromosome number that's a simple sum of the parent species' chromosome numbers (given that it is the simplest type of hybrid sterility scenario where no polyploidy or unusual genetic events are involved), we can determine the somatic chromosome number of a grizzly bear by subtracting the buffalo's chromosome number from the gruffalo's. Thus:
Gruffalo's chromosome number (67) - Buffalo's chromosome number (60) = Grizzly bear's chromosome number.
67 - 60 = 7. However, since we are dealing with somatic (diploid) cells, which have pairs of chromosomes, the number 7 suggests we are missing the mate of each chromosome pair. Therefore, we need to double this to get the actual chromosome pair number which is 14. Among the options provided, there is no 14 because the options are not correct. The somatic cells of a grizzly bear should have 74 chromosomes, which is twice the number we calculated. This looks like a correction of a typo in the question itself. We expected to subtract 60 from 74 (the actual chromosome number of a grizzly bear) to get 14, which when subtracted from the gruffalo's chromosome number, aligns perfectly with the concept of diploidy in animals.
Therefore, with the available information and assuming no typos, there seems to be confusion as the correct answer is not present in the options provided, and the correct number for a grizzly bear would be 74 chromosomes.