Allele frequencies in a population refer to the proportion of each allele for a given gene among all alleles at that locus. Since all possible alleles at a locus contribute to the genetic makeup of that population, the sum of their frequencies must equal one, representing the entire genetic pool for that gene. This ensures that the distribution of alleles reflects the entirety of genetic variation available for that trait within the population.
A population in which the allele frequencies do not change from one generation to the next is said to be in equilibrium.
No, that is not true. The frequencies of all alleles for a gene must sum to 1. In this case, if one allele has a frequency of 0.65 and the other has a frequency of 0.30, their total would be 0.95, leaving a discrepancy of 0.05. Thus, the frequencies need to be adjusted to satisfy the requirement that they add up to 1.
Only one thing: extinction.
allele frequencies in a population will remain constant unless one or more factors cause those frequencies to change
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.
A population in which the allele frequencies do not change from one generation to the next is said to be in equilibrium.
No, that is not true. The frequencies of all alleles for a gene must sum to 1. In this case, if one allele has a frequency of 0.65 and the other has a frequency of 0.30, their total would be 0.95, leaving a discrepancy of 0.05. Thus, the frequencies need to be adjusted to satisfy the requirement that they add up to 1.
Only one thing: extinction.
allele frequencies in a population will remain constant unless one or more factors cause those frequencies to change
Yes, they can. Mutation is one of the four main mechanisms of evolution.
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.
By simple genetic recombination for one. microevolution is just evolution and evolution is the change in allele frequency over time in a population of organisms. Just change over time short of speciation and especially valid for sexually reproducing organisms who always change allele frequencies through coitus and reproduction.
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.
Genetic equilibrium is a theoretical concept used to study the dymamics of single alleles in the population gene pool. In practice, there is no situation in which allele frequencies do not drift to some degree. Large populations may slow drift down, but there will still be drift.
Buckskin
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.
A dominant allele is one that will always be expressed when present.