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No. The gene that causes Huntington's is caused by an autosomal dominant mutation, and one form of inherited Parkinson's is also caused by an autosomal dominant mutation.

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If and individual has one dominant allele and one recessive allele will the recessive allele show up?

No, the dominant allele will be expressed in the individual's phenotype, masking the presence of the recessive allele. The recessive allele will only be expressed if an individual inherits two copies of the recessive allele.


What is the allele that will always show physically?

The dominant allele will always show physically in an individual, while the recessive allele will only be expressed if paired with another recessive allele.


What is an Dominant allele?

A dominant allele is a gene that holds a certain characteristic that is superior to a recessive allele. The dominant allele ALWAYS has its trait shown in the body of the recipient, except when both alleles in a gene are recessive.


What is a dominent allele?

A dominant allele is an allele that can take over a recessive allele, so if you have a dominant allele and a recessive allele, then the offspring will most likely have a dominant allele over a recessive allele. The dominant allele is expressed over the recessive allele.


What is the difference between dominant alleles and recessive alleles?

dominant-appears in first generation recessive-seems to dissapear


What is the allele which is overuled?

The two types of alleles are dominant and recessive. The recessive allele will still be present but the recessive trait is not usually seen. However, is not always overruled. In the cases of codominance and incomplete dominance, the recessive trait still shows through some of the dominant one.


What gene is masked if it is paired with a dominant gene?

The different forms of a gene are called alleles. In Mendelian genetics, a gene has a dominant allele and a recessive allele. The dominant allele masks the recessive allele if present. So there are two possible dominant genotypes: homozygous dominant, in which both dominant alleles are present; and heterozygous, in which one allele is dominant and the other allele is recessive. The only way to express a recessive trait is to have the homozygous recessive genotype.


What will always hide a recessive trait?

A dominant trait will always hide a recessive trait in an individual's phenotype because the dominant allele is expressed over the recessive allele in the presence of both alleles.


Allele that is always expressed if present?

An allele that is always expressed when it is present is the dominant allele.


What happens to a characteristic when there is only one recessive allele?

When there is only one recessive allele present for a characteristic, the dominant allele will be expressed in the phenotype. The individual will exhibit the trait associated with the dominant allele, while still carrying the recessive allele in their genetic makeup.


How is a recessive alle different from a dominant allele?

its different because adominant allele is in charge


What is dominant recessive?

There is dominant and there is recessive. There is no dominant recessive. A dominant gene will always be expressed when present, such as in the homozygous dominant genotype (RR), or heterozygous genotype (Rr). A recessive allele is only expressed when the genotype is homozygous recessive (rr).