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Can you use a punnet square to discribe hemophilia? Please leave me an answer!

2007-03-26 10:52:37 · 5 answers · asked by Anonymous in Science & Mathematics Biology

5 answers

Hemophilia is x-linked recessive.

So if father is hemophilic and mother is a carrier and H is healthy (dominant) and h is hemophilic (recessive):

X(h)Y crossed with X(H)X(h)

You will get

X(H)X(h), X(h)X(h), X(H)Y, X(h)Y

One female will have the disease and one male will have the disease in this case. One female will be a carrier and the other male will be healthy.

2007-03-26 11:01:23 · answer #1 · answered by Kasheia W 2 · 0 0

Haemophilia or hemophilia is the name of several hereditary genetic illnesses that impair the body's ability to control bleeding, an impairment known technically as bleeding diathesis. Genetic deficiencies and a rare autoimmune disorder may cause lowered plasma clotting factor activity so as to compromise blood-clotting; when a blood vessel is injured, a scab does not form and the vessel continues to bleed for an excessive period of time. The bleeding can be external, if the skin is broken by a scrape, cut or abrasion, or it can be internal, into muscles, joints or hollow organs. The result may be visible (e.g., skin bruises) or subtle (e.g., melena, hematuria, or bleeding in the brain). This is called the lack of clotting factors - Haemophilia A has a lack of the clotting factors 8 - and Hemophilia B has a lack of the clotting factors 9 - Hemophilia A occurs in 90% of cases
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2007-03-26 17:59:22 · answer #2 · answered by purplegirl1516 2 · 0 0

In heritable hemophilia, like x-linked hemophilia, the answer is *yes*.

2007-03-26 17:56:06 · answer #3 · answered by Jerry P 6 · 0 0

You mean probability of passing hemophilia on your offspring?

2007-03-26 17:56:15 · answer #4 · answered by Jy 2 · 0 0

it is sex linked recessive trait and doesn't need to be represented in a punnet.
iif the mother is a carrier and the father is affected.

XcX x XcY

XcXc XXc XcY XY

i.e.1:1 ratio of normal:haemoplilic in both male and female offsprings. it is present in 8% of males whereas only 0.04% of females get affected as females are generally carriers.
the affected child is generally inviable.

2007-03-26 17:59:39 · answer #5 · answered by rara avis 4 · 0 0

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