#02 Red-green color blindness is a combination of red-blindness (protan defects) and green-blindness (deutan defects). #03 Color blindness is more prevalent among males than females, because the most common form of color vision deficiency is encoded on the X sex chromosome.
(A womanâs egg, on the other hand, is viable for only about one day once it leaves the ovary.). Sperm can live outside of the body for only about 20 minutes to an hour, depending on how exposed the semen is to the air and other environmental factors.To avoid the slightest risk of pregnancy, a woman should make sure that ejaculated semen doesnât get at all close to her vagina.A womanâs egg, on the other hand, is viable for only about one day once it leaves the ovary.). Sperm can live outside of the body for only about 20 minutes to an hour, depending on how exposed the semen is to the air and other environmental factors.
It is heat sensitive and cannot survive in high temperature. In the man's testicles, the semen or seminal fluid provides a favorable environment. Here, the seminal fluid allows the sperm to be motile and in constant temperature. Inside the body, sperm lives for up to 74 days. The main reason why male's testicles are hanging further away from the man's body is that to protect the sperm from the heat of the body. Sperm may also die due to the person's negative lifestyle. Alcoholism, smoking, drugs and others can affect sperm survival rate.