Search Engine

Haemophilia

HaemophiliaHaemophilia

Video Informations

Title :Haemophilia
Duration : 25m 3s
Uploader : Audiopedia
Added On: : 26 July, 2014
Views : 1221 times
Likes : 2
Dislikes: : 0
Source : YouTube

Sharing



Descriptions

Haemophilia (/hiːməˈfɪliə/; also spelled hemophilia in North America, from the Greek haima αἷμα 'blood' and philia φιλία 'love') is a group of hereditary genetic disorders that impair the body's ability to control blood clotting or coagulation, which is used to stop bleeding when a blood vessel is broken. Haemophilia A (clotting factor VIII deficiency) is the most common form of the disorder, present in about 1 in 5,000–10,000 male births. Haemophilia B (factor IX deficiency) occurs in around 1 in about 20,000–34,000 male births. Like most recessive sex-linked, X chromosome disorders, haemophilia is more likely to occur in males than females. This is because females have two X chromosomes while males have only one, so the defective gene is guaranteed to manifest in any male who carries it. Because females have two X chromosomes and haemophilia is rare, the chance of a female having two defective copies of the gene is very remote, so females are almost exclusively asymptomatic carriers of the disorder. Female carriers can inherit the defective gene from either their mother or father, or it may be a new mutation. Although it is not impossible for a female to have haemophilia, it is unusual: a female with haemophilia A or B would have to be the daughter of both a male haemophiliac and a female carrier, while the non-sex-linked haemophilia C due to coagulant factor XI deficiency, which can affect either sex, is more common in Jews of Ashkenazi (east European) descent but rare in other population groups. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video

Related Videos