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.
Ketchikan is located on the southwestern coast of Revillagigedo Island, opposite Gravina Island, near the southern boundary of Alaska. It is 679 miles north of Seattle and 235 miles south of Juneau.Daily scheduled jet service serves Ketchikan from Seattle, Anchorage, Juneau and many Inside Passage communities.ust 90 miles north of Prince Rupert, British Columbia, Ketchikan hugs the bluffs that form the shoreline along the southwest corner of Revillagigedo Island. Stretching 31 miles long but never more than 10 blocks wide, Ketchikan is centered on Tongass Avenue.