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.
Cat years are very different then human years. The fist year for your cat, by the time she is a year old in human years; she is about 4 years old. My cat who is 9 in human years is 36 in cat years. its about 4 cat years per 1 humna year. At age 7 cats are considered seniors. But they can live 18+ years if well taken care of.