If both beta globin genes code for the sickle protein, the person has sickle cell disease. Sickle cell disease is determined at conception, when a person acquires his/her genes from the parents. Sickle cell disease cannot be caught, acquired, or otherwise transmitted.
For every year of the cat's life after age 2, one cat year equals approximately 4 human years. This is based on how cats mature - for example at around 10 - 11 human years most cats start to slow down quite a lot... This is when they're getting to about 60 years old in Kitty terms.
Cats and humans age differently but the typical 1-year old cat is equivalent to a 16 to 17-year old teenager. Between the ages of 1 and 9, each year equates to 5 to 6 years in humans. A 25-year age cat is 108 years old in human terms.