Gene mutation causes the phenotype frequency in a population to change after each generation.
Gene mutation
Phenotype is determined by what genes you carry. There are many variations on a gene called alleles. Depending on what alleles you inherit from your parents (use a Punnet Square for that) you get a different phenotype. In a population, mating patterns can also be a big thing. Often times, animals will refuse to mate with creatures that have different appearances or phenotypes than them. Because of this, that particular phenotype is rarely seen.
An organism's phenotype, the physical characteristics it possesses, is determined by it's genotype, the genes it has for a particular trait. Let's say, for example, a rose can be 2 colors, red or white, and red is dominant. If the rose has an Rr or RR genotype, it will be red, whereas it can only be white if it has both recessive alleles, or rr.
by how many genes control the trait
allels.......
it's alleles....
Mutation, genetic drift, gene flow and the driver of adaptive change, natural selection.
There are three basic reasons: 1. Natural Selection-- thr environment may have favored the allele in previous generations, but now disfavors it. 2. Genetic Drift-- in every finite population, the frequency of an allele will fluctuate due to chance. For example, the vast majority of sperm fail to fertlize any egg, so allels can be lost this way due to chance. Individuals carrying a copy or copies of an allele may die young due to random accidents, or may never find a mate. These basic chance events cause the frequencies of alleles to fluctuate, and the degree of frequency change depends upon the population size. The greater the population size, the smaller the change in frequency. 3. A combination of both.
Sexual recombination only takes genes already extant and make new combinations. Mutation presents a brand new variation ( if not neutral or deleterious ) to the eye of natural selection. So, mutation, from generation to generation.
Genetic variation, variation in alleles of genes, occurs both within and among populations. Genetic variation is important because it provides the "raw material" for natural selection.
vibrate at its natural frequency APEXX
Gene mutation causes the phenotype frequency in a population to change after each generation.
competition between organisms
Mutation, genetic drift, gene flow and the driver of adaptive change, natural selection.
what is generation gape ,its causes and its solutions? what is generation gape ,its causes and its solutions?
There are three basic reasons: 1. Natural Selection-- thr environment may have favored the allele in previous generations, but now disfavors it. 2. Genetic Drift-- in every finite population, the frequency of an allele will fluctuate due to chance. For example, the vast majority of sperm fail to fertlize any egg, so allels can be lost this way due to chance. Individuals carrying a copy or copies of an allele may die young due to random accidents, or may never find a mate. These basic chance events cause the frequencies of alleles to fluctuate, and the degree of frequency change depends upon the population size. The greater the population size, the smaller the change in frequency. 3. A combination of both.
Genetic Drift
Sexual recombination only takes genes already extant and make new combinations. Mutation presents a brand new variation ( if not neutral or deleterious ) to the eye of natural selection. So, mutation, from generation to generation.
No, the genotype is the genetic composition of the organism. On the other hand, the phenotype is the physical composition of the organism. For example, a gene that causes a bird's feathers to be black in color is the genotype and the phenotype is the actual observable of the black feathers.
If you subtract from the carrier frequency the frequency of the tone that modulates it, then filter out the carrier frequency, then you have a lower sideband frequency. If you add to the carrier frequency, filter out the carrier, then you have an upper sideband frequency.
Google: "Parametric Excitation in Frequency Resonators".
Optimum population refers to a balance between available resources and the number of people in a given area. Causes of achieving optimum population include effective family planning programs, access to education and healthcare, economic opportunities, and social welfare systems that support a sustainable population size. Maintaining a balance between population and available resources helps ensure a higher quality of life for everyone in the community.
Founder Effect