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When one allele of a gene mask the presence of the allele what form is masked?
Dominant
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 is when an individual has two copies of a dominant allele?
When an individual has two copies of a dominant allele, they will display the dominant trait associated with that allele. Dominant alleles mask the expression of recessive alleles in a gene pair.
When the dominant allele does not completely mask the effect of the recessive allele in the heterozygote it is called polygenic dominance incomplete dominance dominance corecessive codominance?
When the dominant allele does not completely mask the effect of the recessive allele in the heterozygote, it is called incomplete dominance. In this case, both alleles contribute to the phenotype, resulting in an intermediate phenotype.
Why are traits controlled by recessive alleles on the X chromosomes are more common in males then in females?
In males, they only have one X chromosome, so if they inherit a recessive allele for a certain trait on their X chromosome, it will be expressed because there is no corresponding dominant allele on the Y chromosome to mask it. Females have two X chromosomes, so even if they inherit a recessive allele on one X chromosome, the dominant allele on the other X chromosome can mask its expression.
Under what condition is a single recessive allele expressed in a male?
A single recessive allele will be expressed in a male if he inherits that allele on his only X chromosome, as males have one X and one Y chromosome. This is because the presence of the recessive allele on the X chromosome has no dominant allele to mask its expression.
What type of allele masks the expression of the recessive allele and is therefore expressed in the heterozygous?
A dominant allele will mask the prsence of a recssive allele
What is caused by a dominant allele located on an autosome?
A dominant allele located on an autosome will be expressed phenotypically in the individual, meaning it will be visible in the physical characteristics of the organism. This dominant allele will mask the effects of any recessive allele at the same locus.
What is the name of the gene pair that consist of a dominant allele and recessive allele?
The name of the gene pair that consists of a dominant and recessive allele, i.e. (Xx) will be a heterozygous allele. In this situation, the characteristics of the dominant characteristic will mask that of the recessive allele. People have have a heterozygous genotype may be carriers for diseases that reside on the recessive allele.
What is a domainit trait?
A dominant trait is a genetic trait that is expressed when an individual has one copy of the dominant allele. In a pair of alleles (one from each parent), the dominant allele will mask the expression of the recessive allele.
Does a dominant allele mask a ressessive allele?
In diploid organisms (those with two copies of each gene carried on separate chromosomes), one of the copies of a given gene may differ from the other copy of the same gene on the twin chromosome. In some cases one version of the gene (the dominant allele) has the effect of 'masking' the activity of the other (the recessive allele); that is, the presence of the dominant allele negates the effect of the recessive allele on the organism's phenotype. There are many mechanisms which can cause this phenomena, and it depends on the particular genes involved, but a simple model is one where the recessive allele is a biochemically inactive version of the dominant allele. In this case the dominant allele would mask the effect of the recessive allele by providing an active version of the gene. The dominant phenotype would be the one which shows the downstream effects of this activity, and the recessive phenotype one which shows the downstream effects of a lack of activity. The dominant allele is said to 'mask' the recessive allele because only one copy is required to result in an elimination of the recessive phenotype, whereas all copies of the gene must be the recessive allele to result in the recessive phenotype.
The difference between a dominate and a recessive trait is?
A dominant trait is expressed when an individual has one or two copies of the dominant allele, while a recessive trait is only expressed when an individual has two copies of the recessive allele. Dominant traits mask the expression of recessive traits in heterozygous individuals.
