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.
Determine if your cat is old or young in relation to human age. Use this app to convert cat age to human age. This calculator uses a method developed by Monsieur LeBeau. After one year, your cat or kitten will have the equivalent age of a fifteen year old person. At two years, the pet will have an equivalent age of twenty four. Between two and fourteen calendar years, the cat will age at a rate of four human years.