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A healthy individual is a carrier of a lethal allele but is unaffected by it what is the probable genotype of this individual?
The probable genotype of this individual is likely heterozygous for the lethal allele, carrying one normal allele and one lethal allele. This individual is considered a carrier because they do not show any symptoms of the lethal allele's effects.
Why are dominant alleles that cause lethal disorders less common that recessive alleles that cause lethal disorders?
A lethal dominant gene prohibits the organism from reproducing irregardless of the paired gene, so it is removed from the gene pool as soon as it appears. A lethal recessive gene, on the other hand, does not prevent reproduction unless it is paired with another lethal recessive, so it may be passed down through many generations before becoming paired and preventing reproduction.
Why are lethal dominant alleles less common than lethal recessive alleles?
Lethal dominant alleles are less common than lethal recessive alleles because individuals with lethal dominant alleles typically die before they can pass on the harmful gene to their offspring, reducing the frequency of the allele in the population. In contrast, individuals with lethal recessive alleles can carry the gene without showing symptoms, allowing the allele to persist in the population through carriers who can pass it on to their offspring.
Allele that prevents the expression of a recessive allele?
A dominant allele
What is allele masked by the dominant allele?
An allele that is masked by the dominant allele is called a recessive allele. When an individual has one dominant allele and one recessive allele, only the trait determined by the dominant allele will be expressed. The recessive allele will only be expressed if an individual has two copies of it (homozygous recessive).
A healthy individual is a carrier of a lethal allele but is unaffected by it what is the probable genotype of this individual?
The probable genotype of this individual is likely heterozygous for the lethal allele, carrying one normal allele and one lethal allele. This individual is considered a carrier because they do not show any symptoms of the lethal allele's effects.
Why are dominant alleles that cause lethal disorders less common that recessive alleles that cause lethal disorders?
A lethal dominant gene prohibits the organism from reproducing irregardless of the paired gene, so it is removed from the gene pool as soon as it appears. A lethal recessive gene, on the other hand, does not prevent reproduction unless it is paired with another lethal recessive, so it may be passed down through many generations before becoming paired and preventing reproduction.
How do dominant lethal alleles persist in populations even though their fitness is essentially zero?
Huntington's disease, where the lethal allele expresses itself very late in an individuals life. Persons carrying the dominant lethal allele does not become aware of the disease until after their reproductive age. Thus, they pass the lethal allele to their children without knowing and the allele persists.
Why are lethal dominant alleles less common than lethal recessive alleles?
Lethal dominant alleles are less common than lethal recessive alleles because individuals with lethal dominant alleles typically die before they can pass on the harmful gene to their offspring, reducing the frequency of the allele in the population. In contrast, individuals with lethal recessive alleles can carry the gene without showing symptoms, allowing the allele to persist in the population through carriers who can pass it on to their offspring.
Allele that prevents the expression of a recessive allele?
A dominant allele
What is allele masked by the dominant allele?
An allele that is masked by the dominant allele is called a recessive allele. When an individual has one dominant allele and one recessive allele, only the trait determined by the dominant allele will be expressed. The recessive allele will only be expressed if an individual has two copies of it (homozygous recessive).
When on e allele of a gene masks the presence of the other allele what form is masked?
The recessive allele.
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.
Which is the dominant allele?
The dominant allele is the trait that shows up in the organism when the allele is present
Allele that is always expressed if present?
An allele that is always expressed when it is present is the dominant allele.
What is it Dominant allele What is a recessive allele?
A genotype in which there are both a dominant and a recessive allele is called heterozygous.
Does recessive allele is expressed if there is no dominant allele present?
Yes, a recessive allele will be expressed if there is no dominant allele present in the genotype. This is because in the absence of a dominant allele, the recessive allele has the opportunity to be expressed in the phenotype.
