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Does a recessive allele need another recessive allele to be expressed?

Yes, a recessive allele needs to be paired with another recessive allele in order to be expressed. This is because recessive alleles are only expressed when an individual has two copies of the recessive allele, one from each parent. If an individual has one dominant allele and one recessive allele for a particular trait, the dominant allele will be expressed.


What is a Reciessive form of an allele?

A recessive form of an allele is one that is only expressed in the presence of another recessive allele.


Is narcolepsy's mutation dominant or recessive?

Neurofibromatosis (NF) is a dominant trait. So only one copy of the mutated gene is needed to have the disorder...for example, if someone with NF marries another person without NF, then the chance that their child would have it is 50%.


If an allele for a particular trait is not expressed at all when another allele for the trait is present the allele is?

The allele not expressed would be recessive whilst the other is dominant. This would be the case in a heterozygous genotype. Hope this helps


What are two diseases linked to the X chromosome?

One disorder could be colorblindness. Colorblindness is most common in males because in order to have to disorder you must carry two mutated X chromosomes. Another recessive genetic disorder you can get is called Hemophilia. This is a disorder in which the genes for hemoglobin are not present and your body is not able to create blood clots and a simple scratch can be very serious.

Related Questions

Is type o blood a type of recessive genetic disorder?

Nope... Its just another type of blood.. its the recessive one...."Universal Donner "!


Under what condition can a female acquire an X recessive disorder?

Both X chromosomes must carry the recessive trait. Since males only have one X chromosome, it is much easier for males to have the recessive phenotype. Put another way, a female would have to receive an X chromosome with the recessive gene from both parents, which would mean the father already displays the recessive disorder.


How is a carrier different from a person who has genetic disorder?

A carrier means that you have the gene for the disorder, but because the gene is recessive (meaning that it only shows when you have two recessive genes) and you obviously have a dominant gene as well, you won't show the disorder. Someone who actually has the disorder has two recessive genes. D = dominant gene r = recessive gene Dr = carrier, no signs rD = carrier, no signs DD = not a carrier, no signs rr = has the disorder


What are two sex-chromosome disorders?

One disorder could be colorblindness. Colorblindness is most common in males because in order to have to disorder you must carry two mutated X chromosomes. Another recessive genetic disorder you can get is called Hemophilia. This is a disorder in which the genes for hemoglobin are not present and your body is not able to create blood clots and a simple scratch can be very serious.


Does a recessive allele need another recessive allele to be expressed?

Yes, a recessive allele needs to be paired with another recessive allele in order to be expressed. This is because recessive alleles are only expressed when an individual has two copies of the recessive allele, one from each parent. If an individual has one dominant allele and one recessive allele for a particular trait, the dominant allele will be expressed.


What does recessive allele mean?

Recessive allele disorders are just as they sound - they are disorders that are a result of a prevalent recessive allele in one's genetic makeup. A recessive allele disorder will rarely occur since it is dependent on the crossing of two heterozygous parent cells, but it can lead to interesting consequences. An example of a recessive allele disorder is hemophilia - the body's inability to clot blood - and it has affected much of the European royalty in history, such as Queen Victoria of Great Britain.


How do i put absence in a sentence?

I will not tolerate another absence from my class!


What is a Reciessive form of an allele?

A recessive form of an allele is one that is only expressed in the presence of another recessive allele.


What is another sentence for the word absence?

I felt an absence in my heart when my dog died.


Is another word for a body cell autosomal?

recessive


Can someone with bipolar disorder develop another disorder?

yes


What is a reccesive gene?

A recessive gene is a gene that is only expressed if an individual has two copies of it, one inherited from each parent. In the presence of another dominant gene, the recessive gene's trait is not expressed.