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Is hemophilia caused by a dominant allele on the x chromosome true or false?
false
Why is hemophilia more common in males than women?
this disease is caused by a recessive allele that is found only on the x chromosome. a human female has two x chromosomes. a human male only has 1 x chromosome. therefore, a male needs only one recessives allele to have hemophilia, while a female needs two recessive allele. as a result, hemophilia is much more common in males.
Is hemophilia A sex-linked?
No. It is caused by a recessive allele on the X chromosome.
How does hemophilia progress?
Hemophilia is a recessive allele condition. Men can get hemophilia alot easier than women as the allele is found on the XY Chomosome pair. With men. they do not have the extra "tail" on the Y chromosome compared to the XX with a female. If the person has the recessive allele on the X chromosome and this person is male, they will be a hemophiliac as they do not have a 'pair' allele which could be dominant to stop the condition expressing itself. On a female, if there is a recessive (hemophilia) allele on one of the X chromosomes but on the other is a Dominant (normal) allele then she will be a carrier of the faulty gene but will not suffer from the condition herself. If the female have a recessive (faulty) gene on each of the XX chromosomes, then she will be a sufferer of the disease.
A gene on the female chromosome having no allelic partner on the y chromosome would be what?
An individual (male) with an allele on the X chromosome but no corresponding allele on the Y chromosome is described as hemizygous. Genes which are inherited in this way are described as sex-linked or X-linked. An example is hemophilia - the inability of the blood to clot. It is caused by a recessive allele, so males only need to inherit one copy to develop the characteristic. Females can inherit one hemophilia allele and one normal allele, so they can act as carriers of the disease without developing it themselves. See http://en.wikipedia.org/wiki/X-linked_gene
What chromosome does hemophilia come from?
The X Chromosome.
Why Males having a greater chance of hemophilia?
Hemophilia occurs in the X chromosome, and males are the genders that have the X chromosome.
What chromosomes does hemophilia occur on?
Hemophilia is a X linked recessive disorder. Usually the mother is an unaffected carrier and her son unfortunately receives the X chromosome in which hemophilia is linked to.
How many alleles for hemophilia do females have?
females have 2 alleles for hemophilia, (X^hX^H) and (X^hX^h) if H is the normal allele and h is the recessive allele for hemophilia
Is hemophilia a defect?
Hemophilia is a genetic mutation of the sex-linked X chromosome.
Why is hemophilia rarely expressed in females?
Because hemophilia is a disease linked to a recessive gene on the X-chromosome, females have another X-chromosome to block out the diseased one. However, males have only one X-chromosome, so they are more often subject to hemophilia.
Is hemophilia a pattern inheritance?
Hemophilia is a sex linked gene carried in the x chromosome.
