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What is an individual who has a recessive disease causing allele at a particular gene on one chromosome and a normal allele at that gene on the other chromosome?

An individual with a recessive disease-causing allele on one chromosome and a normal allele on the other chromosome is referred to as a heterozygote for that gene. Since the disease is recessive, the normal allele typically masks the effects of the recessive allele, meaning the individual usually does not exhibit symptoms of the disease. However, they can still pass the recessive allele to their offspring.


What does a dominant allele does this to another allele?

A dominant allele will mask the expression of a recessive allele when they are present together in an organism. The dominant allele will be expressed, while the recessive allele will not be visibly expressed in the organism's phenotype.


What alleles would a homozygous recessive organism have?

A homozygous recessive organism would have two copies of the same recessive allele for a particular gene. This means that both alleles carried by the organism would be the recessive form.


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


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.

Related Questions

Will an organism with a recessive allele for a particular form of a trait will always exhibit that form?

No, an organism with a recessive allele for a particular trait will only exhibit that form if it has two copies of the recessive allele (homozygous recessive). If it has one dominant allele, it will exhibit the dominant form of the trait.


In one allele is dominant to a recessive allele?

In a dominant-recessive allele relationship, the dominant allele will be expressed phenotypically over the recessive allele. This means that even if an organism carries one dominant and one recessive allele for a particular trait, the dominant allele will determine the observable characteristic.


Why is it not necessary when the dominant and recessive traits are known to use the term homozygous when referring to the genotype of an individual that has a recessive phenotype?

When the dominant and recessive traits are known, using the term "homozygous" for the recessive phenotype is redundant because it implies that both alleles are the same (rr for a recessive phenotype). It is clear that the individual is homozygous for the recessive allele by observing their phenotype.


An organism carrying one dominant and one recessive allele for a particular trait would be what?

Heterozyous


An organism carrying one dominant and one recessive allele for particular trait would be for that trait?

Heterozygous.


When an organism is carrying one dominant and one recessive allele for a particular trait what would be that trait?

Heterozygous


What is an individual who has a recessive disease causing allele at a particular gene on one chromosome and a normal allele at that gene on the other chromosome?

An individual with a recessive disease-causing allele on one chromosome and a normal allele on the other chromosome is referred to as a heterozygote for that gene. Since the disease is recessive, the normal allele typically masks the effects of the recessive allele, meaning the individual usually does not exhibit symptoms of the disease. However, they can still pass the recessive allele to their offspring.


When is the only time a recessive trait appears on a organism?

A recessive trait only appears in an organism when it is homozygous for that trait, meaning it has two copies of the recessive allele. This occurs when an organism inherits the recessive allele from both parents.


An organism carrying one dominant and dominant and one recessive allele for a particular trait would be what for that trait?

Heterozygous.


What does a dominant allele does this to another allele?

A dominant allele will mask the expression of a recessive allele when they are present together in an organism. The dominant allele will be expressed, while the recessive allele will not be visibly expressed in the organism's phenotype.


What alleles would a homozygous recessive organism have?

A homozygous recessive organism would have two copies of the same recessive allele for a particular gene. This means that both alleles carried by the organism would be the recessive form.


What is meant by dominance?

Complete dominance means that the dominant allele completely masks the effects of the recessive allele. The only way a recessive allele can be exhibited phenotypically is if the organism is homozygous recessive for that allele.