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What are a woman chance of being a carrier for hemophilia if she phenotypically a normal woman and has phenotypically normal parents but has a hemophiliac brother?
She has 1/2 chance. We can figure out exactly what her parents' genotypes were.
Her brother has a Hemophilia allele that he got from his mom. So their mom has at least 1 Hemophilia allele. If she had 2 then she would have Hemophilia.
The father cannot have a Hemophilia allele because it would have been expressed.
So her chances are 1/2 because her mother has 1 Hemophiliac and 1 normal allele.
What else can I help you with?
Could two phenotypically normal parents have a child with Hemophilia A?
XhXh - with hemophilia XhXH- carrier of hemophilia
Sam has hemophilia. Sam's brother mother and father do not have hemophilia. Draw a pedigree showing who has the disorder and who is a carrier?
In a pedigree chart, Sam would be represented by a filled square (male) or circle (female) to indicate that he has hemophilia. Since Sam's brother, mother, and father do not have hemophilia, they would be represented by unfilled squares (male) or circles (female). However, Sam's mother would be a carrier of the hemophilia gene, so she would be represented by a half-filled circle. The pedigree would show Sam with hemophilia, his mother as a carrier, and his brother, father, and other family members without the disorder.
How did Queen Victoria inherit hemophilia?
There are several possibilities of how she inherited hemophilia, but nobody will ever know for sure. Some possibilities are 1. That she is not the Granddaughter of King George III-meaning she was the biological daughter of a hemophiliac 2. Her mother (Victoria of Sax-Coburg) was a carrier - which turned out to be false.
Can a male be a carrier for hemophilia?
The gene for hemophilia is found on the 'X' human chromosome. However it is a recessive gene so if a woman (who has two 'XX' chromosomes) has one bad 'X' and one good 'X' she will not have hemophilia but will be a carrier .If she has female children and their father is not a hemophiliac, then half of her daughters may carry the bad 'X' chromosome but non will manifest the disease.However, if her children are male then her sons will have an 'X' chromosome inherited from her and a 'Y' chromosome inherited form the father and there is a 50% chance that the 'X' chromosome inherited will be the bad one. If the son inherits the bad 'X' he will be a hemophiliac and if he lives to father any daughters then all these daughters will be hemophilia carriers (because they must inherit his (bad) 'X' chromosome).It is possible for a woman to manifest hemophilia if the mother is a carrier and the father is a hemophiliac. In this case it is possible for a daughter to inherit the bad 'X' from the father and the mother's bad 'X' giving the daughter two bad 'X' chromosomes.
A woman is a carrier for hemophilia what are the chances for sons with hemophilia if the father does not have hemophilia?
Since the gene for Hemophilia is carried on the X chromosome and males pass only their Y chromosome onto their sons, no their sons should not have hemophilia. Of course all daughters of a male with hemophilia will be carriers of the mutation since they with receive his X chromosome, not the Y.
What are the offspring of hemophilia?
Hemophilia is passed down from mother to son. It is extremely rare for a woman to have hemophilia. It is necessary, though, for a woman to be a carrier of the disorder for her son to acquire this disorder. Females have two X chromosomes whereas males only have one. When a boy is born, he takes one X chromosome from his mother and one Y chromosome from his father. Therefore, he can only get hemophilia through his mother. Example One: Mother(Carrier)+Father(Non-Affected)=50% chance of their son acquiring the disorder and 50% chance of their daughter being a carrier. Example Two: Mother(Non-Affected)+Father(Hemophiliac)=All sons will be non-affected and all daughters will be carriers.
How many children would have hemophilia if the female was a carrier of hemophilia and male was normal?
Hemophilia is passed down from mother to son. It is extremely rare for a woman to have hemophilia. It is necessary, though, for a woman to be a carrier of the disorder for her son to acquire this disorder. Females have two X chromosomes whereas males only have one. When a boy is born, he takes one X chromosome from his mother and one Y chromosome from his father. Therefore, he can only get hemophilia through his mother. Example One: Mother(Carrier)+Father(Non-Affected)=50% chance of their son acquiring the disorder and 50% chance of their daughter being a carrier. Example Two: Mother(Non-Affected)+Father(Hemophiliac)=All sons will be non-affected and all daughters will be carriers.
Can two normal parents produce a hemophiliac son?
Approximately 1/3 of the cases of hemophilia are results of random mutations at the time of conception. Thus it is really not that uncommon for two people with completely standard genetics to have a child with hemophilia. Another possibility is that the mother was a carrier and didn't know. Since Hemophilia is due to a mutation on the X chromosome and females have two X chromosomes, it is possible for her to have no signs or reason to believe that she is a carrier. Even in cases with no family history prior, the spontaneous mutation can effect one of the mother's X chromosomes and then get passed on without her knowing she was a carrier.
Is hemophilia co dominant or dominant?
It is very much recessive with only one exception, which is that there is a large portion of women who simply carry the trait but dont actually have it. If you are to procreate with a female carrier than your chances of having a hemophiliac child are still not very high. You can find all the info you need by using a Punnett Square method to figure out the chances of hemophiliac children with 2 parents.
A girl is a hemophiliac whose mother is normal what are the genotypes of her parents?
The girl must have inherited an X chromosome with the hemophilia gene from her mother, who is a carrier (heterozygous X^HX^h). The father must have contributed a Y chromosome, as males determine the offspring's sex. The father's genotype is not directly related to the daughter's hemophilia status.
What is the probability that their son has hemophilia?
Hemophilia is passed down from mother to son. It is extremely rare for a woman to have hemophilia. It is necessary, though, for a woman to be a carrier of the disorder for her son to acquire this disorder. Females have two X chromosomes whereas males only have one. When a boy is born, he takes one X chromosome from his mother and one Y chromosome from his father. Therefore, he can only get hemophilia through his mother. Example One: Mother(Carrier)+Father(Non-Affected)=50% chance of their son acquiring the disorder and 50% chance of their daughter being a carrier. Example Two: Mother(Non-Affected)+Father(Hemophiliac)=All sons will be non-affected and all daughters will be carriers.
What is a carrier for hemophilia?
A carrier for hemophilia is a female who carries the genetic mutation for hemophilia on one of her X chromosomes, but does not exhibit symptoms of the condition herself. Carriers can pass on the gene mutation to their children, resulting in hemophilia in male offspring. Testing can confirm carrier status.
