Hemophilia the inability of blood to clot is caused by a sex...

Hemophilia, the inability of blood to clot, is caused by a sex-linked, recessive gene. If a woman, whose father was a hemophiliac, marries a man whose blood clots normally, a) what percentage of their children will have hemophilia? b) what percentage of male children? Of female children?

Transcript

00:02 Hemophilia which can be given as h .p.

00:05 Is an x -linked recessive disorder and this disorder prevents the blood from getting trotted.

00:17 So it generally prevents blood clots.

00:22 Since it is a recessive disorder it will be inherited only if the recessive genes are present in an individual.

00:30 So here a woman whose father will be a hemophilic will be a hemophilic will be a will have the genes capital x small h and capital y.

00:48 Here this father is hemophilic in nature and the daughter to this father will have the genes one which is received from her mother which will be dominant and the other x gene which is received from the father will be recessor as the father is recessive with hemophilic.

01:13 Hemophilia.

01:15 So the woman has the gene, capital x, capital h and capital x small h.

01:22 When this woman mates with the normal man whose genes will be capital x, capital h and capital y.

01:32 So let's find the probability of the children with haemophilia.

01:40 This can be found using a knit square.

01:44 So when capital h.

01:46 And y which is the genotype of the male and capital h small h which is a genotype of female is crossed we get capital h capital h capital h capital h and small h small h and y so from this it is clear that this population which is the women will be non -hemophilia because there is no recessive gene here so there is no hemophilia...

Question

Hemophilia, the inability of blood to clot, is caused by a sex-linked, recessive gene. If a woman, whose father was a hemophiliac, marries a man whose blood clots normally, a) what percentage of their children will have hemophilia? b) what percentage of male children? Of female children?

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