Example 2: 1  a sporadic form, which is caused by a somatic mutation in each of the two RB genes in a cell. 2  a familial (inherited) form, which is caused by a somatic mutation to one RB gene in a cell that already has one mutant RB gene inherited through the germline from a parent.
For the month of September 2012, Ketchikan reported average temperatures of 53.3Â°F, 0.8Â°F above the long-term mean of 52.5Â°F. The maximum temperature for the month was 67Â°F, which occurred on the 7th, while the minimum (41Â°F) was reported on the 16th.
The Â½-mile (800 m) wide channel called the Tongass Narrows separates Ketchikan from Gravina Island, where Ketchikan International Airport is located. Deer Mountain, a 3,001-foot (915 m) peak, rises immediately east of the city's downtown area.etchikan has a climate greatly modified and moderated by its maritime location, featuring an oceanic climate (Koeppen KÃ¶ppen) cfb which is likened To scotland Or Northern ireland though with much more. Rain winters are cool but far milder than its latitude alone may: Suggest january has a-24 hour average of.33 Â°6 (f.0 Â°9). c