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In a family with parents who do not have hemophilia one son has hemophilia. Who was the carrier of the gene for hemophilia?
Missalex16
First of all, Spontaneous mutations account for 1/3 of the cases of genetic hemophilia. This means that 1 out of 3 people born with hemophilia have no family history of the trait prior to that person. In the scenario you are describing, you are assuming that there was a carrier when in fact, there is a good chance that there was not.
There is also a chance that the child born with hemophilia received the mutation from his mother. Frequently women will have the mutation on one X chromosome but not their second. Depending od the individual case, the mother could carry the gene but not be symptomatic.
It is impossible for the son to have received the gene from his father. Since in order for a boy to actually be a boy, he must receive his father's Y chromosome and not his X chromosome, a son cannot receive the affected X chromosome from his father. Also, in order for a father to pass the trait on through daughters, the father himself would be a hemophiliac.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoSince the defective gene is on the X chromosome, a boy must inherit it from his mother
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If you know a woman has hemophilia what can you infer about her parents genetype?
Her father has to have hemophilia as well, and the mother is a carrier or also has hemophilia. So if we pretend that the hemophilia gene is "x", you need to have "xx" to have hemophilia. The father must have the genotype "Yx" and the mother has the have "Xx" or "xx".
Is hemophila dominant or recessive?
hemophilia is a recessive gene, if you are A female that is a carrier then if you were to have a male child it will be passed on to him. As well as if you were to have a male child who would have hemophilia. your daughter would need to be tested to see if she carried it as well. Only Males have hemophilia but females carry it.My family has dealt with hemophilia for years.My great Aunt carrier, her son has hemophiliaMy mother a carrier, my brother has hemophilia, I do not carry it.My Aunt is a carrier, my cousin he has it, his sister carrier as well.The scientific answer isThis is due to the fact that females have two X chromosomes while males have only one, lacking a 'back up' copy for the defective gene the defective gene becomes manifest more easily in males. Because females have two X chromosomes and because haemophilia is rare, the chance of a female having two defective copies of the gene is very low, thus females are almost exclusively asymptomatic carriers of the disorder.
Is hemophilia a pattern inheritance?
Hemophilia is a sex linked gene carried in the x chromosome.
You can be a carrier of a recessive gene as part of your?
You can be a carrier of a recessive gene as part of your genotype.
What gene or chromosome is mutated in the hemophilia disorder?
There are two types of hemophilia. Type A: A mutation in the factor VIII gene. Type B: A mutation in the IX gene.
Who can inherit hemophilia?
Anyone can inherit hemophilia. In most cases, it is a man whose mother is a carrier of the disease. It is extremely rare for a woman to have hemophilia but it is not uncommon for one to be a carrier. It is even possible for someone whose family has no record of hemophilia to get it through gene mutations.
If you know a woman has hemophilia what can you infer about her parents genetype?
Her father has to have hemophilia as well, and the mother is a carrier or also has hemophilia. So if we pretend that the hemophilia gene is "x", you need to have "xx" to have hemophilia. The father must have the genotype "Yx" and the mother has the have "Xx" or "xx".
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.
Did Stacy Romanov and her sisters have hemophilia?
Grand Duchess ANASTASIA and her sisters were probably carriers of the hemophilia gene but did not suffer from the effects of hemophilia. Males suffer from hemophilia. In rare cases girls do suffer but that is only when both parents carry the mutated gene
Is hemophila dominant or recessive?
hemophilia is a recessive gene, if you are A female that is a carrier then if you were to have a male child it will be passed on to him. As well as if you were to have a male child who would have hemophilia. your daughter would need to be tested to see if she carried it as well. Only Males have hemophilia but females carry it.My family has dealt with hemophilia for years.My great Aunt carrier, her son has hemophiliaMy mother a carrier, my brother has hemophilia, I do not carry it.My Aunt is a carrier, my cousin he has it, his sister carrier as well.The scientific answer isThis is due to the fact that females have two X chromosomes while males have only one, lacking a 'back up' copy for the defective gene the defective gene becomes manifest more easily in males. Because females have two X chromosomes and because haemophilia is rare, the chance of a female having two defective copies of the gene is very low, thus females are almost exclusively asymptomatic carriers of the disorder.
What gene does hemophilia affect?
The gene that causes hemophilia is located on the X chromosome. A woman who gives birth to a child with hemophilia often has other male relatives who have hemophilia. Sometimes, a baby will be born with hemophilia when there is no known family history. This means the gene can be"hidden"( or passed down through several generations of female carriers without affecting any male members of the family) or the change in the X chromosome is new (a spontaneous mutation).
Which of Queen Victoria of England children became hemofiliac carrier?
Queen Victoria had nine children. Two of her daughter's Alice and Beatrice were carriers who gave the gene of hemophilia to their children and grandchildren. Queen Victoria also had a son Leopold who had hemophilia and gave the gene to his daughter and grandson.
What is a likelihood that a person who has two parents with the disease will be a carrier of the defective gene?
100%
Are there any other ways to get cystic fibrosis?
No, it is a hereditary disease meaning it's only in the family and oth parents have to hold the gene for the child to get CF, you have to be born with CF you can't get it like the flu. Say the mother was a carrier of the CF gene but the Dad is not, the child would only be a carrier, but if both parents are then it's likely the child will have CF
What was the Impact of Queen Victoria's hemophilia?
Queen Victoria herself did not have hemophilia she was just a carrier for it. The impact for her being a carrier for hemophilia was catastrophic. Many historians would say that because of her transfering the gene for hemophilia to two daughers and a son it had an impact in the Russian revolution, and the Spanish Revolution. The Russian Revolution part was because Queen Victoria passed in on to her daughter Alice, who passed it on to her daughter Alexandra, who passed it on to her son Alexi the Tsarivitch of Russia. No one outside of the Russian royal family knew the Alexi had hemophilia and resented Rasputin for getting near the Emperial family which ultimatly led to the Revelution The Spanish Revelution because Queen Victoria passed the gene onto her daughter Beatrice who passed it on to her daughter Victoria Eugenia who passed it on to some of her children and several sons were disqualified from the throne of Spain because they were hemophiliacs. This ultimatly led to Franco taking over.
Are there carriers for albinism?
Yes. If either parent is a carrier of the gene that causes albinism then their child becomes a carrier as well. It is only when both parents have the gene for albinism that the child is born with this disorder.
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.
