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An allele that can have a harmful effect is known as a pathogenic allele. These alleles can lead to genetic disorders or increase susceptibility to diseases, often resulting in negative health outcomes. For example, the BRCA1 and BRCA2 alleles, when mutated, are associated with a higher risk of breast and ovarian cancer. Such harmful alleles can be inherited from one or both parents and can significantly impact an individual's health and well-being.
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What does a dominant allele always do?
A dominant allele expresses its trait in an individual when present, masking the effect of a recessive allele. This means that if an individual has at least one copy of a dominant allele, the associated trait will be displayed.
Is it true that people who are heterozygous recessive allele but who have a normal phenotype eill not pass the harmful recessive allele to their kids?
It depends on the genotype of the childs other parent. If your partner is heterozygous as well then there is a 25% chance your child will be homozygous recessive. If they are homozygous dominant then none of your children will have the phenotype of the recessive trait. They will just possibly be carriers of the recessive allele.
Two alleles for a certain trait are passed to an individual. what terms refers to the trait that will show up in the individual?
The allele that is expressed in an individual is referred to as the dominant allele. This allele masks the effect of the recessive allele when present.
What is An allele whose expression overpowers the effect of a second form of the same game?
An allele that overpowers the effect of a second form of the same gene is called a dominant allele. When a dominant allele is present, its traits are expressed in the organism, masking the effects of the recessive allele, which only shows its traits when two copies are present. This relationship is fundamental to Mendelian genetics and helps explain how traits are inherited.
What is the opposite of incomplete dominance?
The opposite of incomplete dominance is complete dominance. In complete dominance, one allele completely masks the effect of another allele at the same locus, resulting in a phenotype that reflects only the dominant allele. For example, in a complete dominance scenario, a plant with a dominant allele for flower color will exhibit that color, while the recessive allele has no visible effect on the phenotype.
Why might a harmful allele persist in a population for many generations?
A harmful allele may persist in a population due to genetic drift, where chance events can lead to its continued presence. Additionally, if the allele is recessive or has a late-onset effect, it may not be selectively disadvantageous enough to be eliminated by natural selection. Finally, a harmful allele may also persist if it is linked to a beneficial allele in the genome, creating a genetic trade-off.
Why does selection act faster against a harmful dominant allele than a harmful recessive allele?
Selection acts faster against a harmful dominant allele because individuals with the allele will show the harmful trait, making them more likely to be removed from the population. In contrast, harmful recessive alleles are only expressed in homozygous individuals, making it harder for selection to act on them as carriers of the allele may not exhibit the harmful trait.
What is a dominant allele what is a recessive allele?
An allele that hide the effect of other allele is called dominant.Allele that is masked is called recessive .
What is a process that eliminated harmful allele from a gene pool?
negative selection.
What does a dominant allele always do?
A dominant allele expresses its trait in an individual when present, masking the effect of a recessive allele. This means that if an individual has at least one copy of a dominant allele, the associated trait will be displayed.
Is it true that people who are heterozygous recessive allele but who have a normal phenotype eill not pass the harmful recessive allele to their kids?
It depends on the genotype of the childs other parent. If your partner is heterozygous as well then there is a 25% chance your child will be homozygous recessive. If they are homozygous dominant then none of your children will have the phenotype of the recessive trait. They will just possibly be carriers of the recessive allele.
What is an organism that is heterozygous for a harmful trait?
An example of an organism that is heterozygous for a harmful trait is a carrier of a genetic disease like sickle cell anemia. In this case, the individual has one copy of the normal allele and one copy of the disease-causing allele, which can lead to the manifestation of the disease in offspring if they inherit two copies of the harmful allele.
Is when one allele completely masks another?
This is called complete dominance, where one allele completely masks the expression of another allele in a heterozygous individual. The dominant allele is expressed phenotypically, while the recessive allele remains hidden.
Two alleles for a certain trait are passed to an individual. what terms refers to the trait that will show up in the individual?
The allele that is expressed in an individual is referred to as the dominant allele. This allele masks the effect of the recessive allele when present.
What is An allele whose expression overpowers the effect of a second form of the same game?
An allele that overpowers the effect of a second form of the same gene is called a dominant allele. When a dominant allele is present, its traits are expressed in the organism, masking the effects of the recessive allele, which only shows its traits when two copies are present. This relationship is fundamental to Mendelian genetics and helps explain how traits are inherited.
What is the opposite of incomplete dominance?
The opposite of incomplete dominance is complete dominance. In complete dominance, one allele completely masks the effect of another allele at the same locus, resulting in a phenotype that reflects only the dominant allele. For example, in a complete dominance scenario, a plant with a dominant allele for flower color will exhibit that color, while the recessive allele has no visible effect on the phenotype.
What is e difference between a dominate and recessive allele?
The answer is that The difference is that dominant dominates, and recessive is dominated.
