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What must individuals with a trait do in order for evolution to occur in the population?
The trait must be in the germ line, it mist be passed on t progeny who thrive well enough to pass it on in an amplified manner, it must be beneficial, that is confer reproductive advantage and then the frequency of this allele must come to fixation in the populations gene pool. Then evolution, the change in allele frequency over time in a population of organisms has occurred.
What else can I help you with?
In order for evolution to occur in a population individuals with a trait that is naturally selected for must?
Individuals with the beneficial trait must survive and reproduce at a higher rate than those without the trait. This differential reproductive success leads to an increase in the frequency of the advantageous trait in the population over time, allowing for evolution to occur.
Which must be in place within a population in order for the theory of evolution to hold true?
In order for the theory of evolution to hold true within a population, there must be genetic variation among individuals, a mechanism for inheritance of traits from parents to offspring, and differential survival and reproduction based on these inherited traits. These conditions allow for natural selection to occur, driving the process of evolution within a population over time.
What are the conditions a population must meet in order to have genetic equilibrium?
1. No net mutations occur; that is, the alleles remain the same 2. Individuals neither enter nor leave the population 3. The population is large (ideally, infinitely large) 4. Individuals mate randomly 5. Selection does not occur
What mechanisms must be in place in order for evolution to occur?
For evolution to occur, there must be genetic variation within a population, inheritability of these genetic traits from one generation to the next, differential survival and reproduction based on these traits (natural selection), and long periods of time for changes to accumulate across generations.
What must happen in order for evolution to exist?
Without heredity what use would there be to selection and why evolution? Just take beneficial mutations in the germ line for example. No heredity and nothing to enter the populations gene pool and no evolution. No heredity and there would be no variation in populations and the first environmental challenge would carry your population to extinction.
What is a population what componets must be identified in order to define a population?
individuals, time, and place.
In order for evolution by natural selection to occur what has to happen?
There must be genetic variation, the variation must be heritable, and there must be differential reproduction (due to competition).
What conditions must be met in order for selection to occur?
Selection occurs when there is variation in a population, that variation is heritable, and individuals with certain traits have a higher chance of survival and reproduction. This process allows advantageous traits to become more common in a population over generations.
What did Charle Darwin compare on the bird and what caused the difference?
He didn't do the study of the Galapagos Finches. The people who studied these birds were biologist Peter Grant and Rosemary Grant. They looked at beak size and shape. The finches are commonly called Darwin's finches, however, they really were not studied by him. They used to finches to study Darwin's Theory of Evolution by Natural Selection. In order for NS to occur there must be variation in a population, variations must be heritable, the species must be reproductively successful, and the survival and reproduction of an individual must be nonrandom. The Grants came up with 4 postulates based on the NS model. 1. Is the finch population variable? 2. Is some off the variation among individuals heritable? 3.Do individuals vary in their reproductive success? 4. Are survival and reproduction nonrandom? The overall conclusion that they made was that: when all four of Darwin's postulates are true in a population, the population will evolve; and that evolution an occur over a short period of time.
Why does evolution take a long time?
The reason that evolution takes a long time is because each generation, the offspring are nearly identical to their parents. However, they are slightly different, and thus a few of the individuals are slightly more likely to survive than the others. Then, these individuals spread their genes to just a few more offspring than the others do.Because there is only a tiny difference in how many offspring the more adapted version has, it takes a long time for the more adapted version to completely replace the older version.
WHAT are 5 conditions needed in order for evolution to not occur?
Lack of genetic variation within a population. Small population size that restricts gene flow. No mutations that introduce new genetic material. Lack of environmental pressures or changes. High levels of genetic drift that prevent natural selection from acting.
Why must a population have a genetic variation in order for natural selection to occur?
Without variation there is nothing to select from.
