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Why is it possible for a man to be a carrier with a recessive genetic disorder but not with a sex-linked disorder?
Wiki User
∙ 14y ago
The body has 23 pairs of chromosomes. There are numbers 1-22, then the 23rd pair are the sex chromosomes. Females have two X chromosomes, making them XX, men have one X and one Y, making them XY.
The principle of a genetic disorder, let's call it "p", is that if someone has one normal, dominant chromosome "P" and one disease-causing, recessive chromosome "p", they are a carrier for the disease, but don't actually suffer from it (effectively the "P" overrides the "p").
Sex-linked disorders are carried on the X chromosome. If a woman inherits one normal X and one X with a recessive disease on it, she will just be a carrier, as she always gets two X's. Men on the other hand are XY, any disease they inherit on their X chromosome will present because they don't have another, potentially normal, X around to override the diseased one.
Hope this helps. :)
Wiki User
∙ 14y ago
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Can a person be a carrier for a dominant genetic disorder?
Anyone can be a carrier of a recessive genetic disorder (as long as it is not associated with the sex chromosomes) no matter what their gender since "carrier" refers to an individual that is heterozygous for the recessive allele and therefore phenotypically normal. Specifically, sexlinked genetic disorders can be "carried" by a heterozygous female but males (having only one X chromosome) cannot. Males will either be free of the defective gene or be affected.
How is a carrier different from a person who has genetic disorder?
A carrier is a person who has one copy of a gene mutation for a genetic disorder but does not show symptoms themselves. A person with a genetic disorder has two copies of the gene mutation and will exhibit symptoms of the disorder. Carriers can pass the gene mutation on to their children, increasing the risk of the disorder being present in future generations.
Who is a person that is a carrier for a sex-linked recessive disorder?
Usually female.
Is cystic fibrosis dominant or recessive?
Cystic Fibrosis is recessive. If you have one CF gene and one non-CF gene, you will be a carrier but not have CF.
If you were a carrier of one allele for a certain recessive disorder how could genetic counseling help you prepare for the future?
Well, genetic counseling usually tells someone the consequences of their recessive disorder.
Why can an individual be a carrier but not have that disorder?
Yes because most diseases or disorders are recessive and therefore there can be carriers that are normal.
Is alkaptonuria caused by a recessive or dominant allele?
Alkaptonuria is caused by a recessive allele. It is an autosomal recessive disorder, meaning that an individual needs to inherit two copies of the defective gene (one from each parent) in order to have the condition.
A female who is a carrier of Fabry's disease has what chance of having a daughter who is a carrier?
The mother has a 50% chance of passing the defective recessive gene to her daughters who will be carries of the disorder (like their mother).
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 is the genotype of a carrier of recessive disorder?
A carrier is someone who does not have a disorder but carries the allele on to offspring.
A carrier of a genetic disorder who does not show symptoms is most likely to be to transmit it to offspring?
A carrier of a genetic disorder who does not show symptoms is most likely to be heterozygous for the trait and able to transmit it to his offspring. The term heterozygous refers to a pair of gene with one dominant trait and one recessive trait.
What is a heterozygous indivisual who doesnt show a reccesive genetic disorder but who can pass a reccesive allele on to their offspring is called what?
The individual is called a carrier. This means they carry a recessive allele for a genetic disorder, but they do not exhibit symptoms of the disorder themselves. However, they can pass on the recessive allele to their offspring.
