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.
According to Alaska Travel, average highs in the Inside Passage region range from 55 to 65 degrees Fahrenheit during cruise season, with May and September being about 10 degrees colder during the day than the summer months. Hours of daylight range from 14 to 18, with June having the most daylight hours and September having the least. South central Alaska has similar weather, with average temperature highs of 55 degrees Fahrenheit in both May and September; average temperatures range between 62 and 65 degrees F in June, July and August.