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Discuss the issues related to genetic diversity mutations sexual reproduction migration and population size?
Wiki User
∙ 12y ago
Discuss the issues related to genetic mutations: sexual reproductions, migration and population size
Wiki User
∙ 12y ago
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What tends to increase genetic variation in a population?
Genetic variation is the total amount of genetic diversity present within a species or population. The amount of genetic variation in a population will depend on a variety of factors, including the size of the population, the type of reproduction, and environmental influences. The primary way to increase genetic variation in a population is through mutation. Mutations are random changes in the genetic code that can lead to new traits or characteristics. Mutations can be caused by environmental factors, such as exposure to radiation or chemicals, or they can occur spontaneously. Mutations can be beneficial, neutral, or detrimental to the organism, but they do lead to increased genetic variation. Another way to increase genetic variation in a population is through migration. When individuals from different populations mate, they bring with them different alleles from their home population, increasing the genetic diversity of the new population. This is especially important for populations that are geographically isolated, such as island populations. Another factor that can increase genetic variation is sexual selection. This is the process by which individuals select mates based on certain desired traits. This can lead to an increase in the number of different alleles in the population, as individuals with certain traits will be more likely to reproduce. Finally, gene flow is a process that can increase genetic variation in a population. Gene flow is when individuals from one population move to another population and mate with individuals in the new population. This can bring in alleles from the original population, increasing the genetic diversity of the new population. Overall, while mutation, migration, sexual selection, and gene flow are all important factors in increasing genetic variation in a population, it is important to note that genetic variation can also be decreased by inbreeding and genetic drift. Inbreeding is when individuals mate with close relatives, reducing the number of alleles in the population and leading to decreased genetic variation. Genetic drift is when random fluctuations in allele frequencies occur due to a small population size, leading to decreased genetic variation. Therefore, it is important to consider all of these factors when trying to increase genetic variation in a population.
What are 2 sources of genetic variation in a population?
Any two of: Mutations Non-disjunctions during anaphase of meiosis Polyploidy Sexual reproduction e.g. crossing-over/recombination during meiosis IF YOU ARE LOOKING FOR THE STUDYISLAND ANSWER IT IS a population whose members have many different traits
How does sexual reproduction affect genetic traits?
Asexual reproduction impacts genetic variation by limiting future genetic change to mutations only; sexual reproduction allows future generation to mix in a nearly infinite range of phenotypes (external appearance).
Breeders can increase the genetic variation by inducing what?
The introduction of animals into a breeding population that are unrelated will increase genetic variation.
Is it common for a population to remain in genetic equilibrium?
1) No mutations 2) No natural selection 3) No individuals in or out of a population. 4) Large population 5) Random mating It is, however, impossible for a population to achieve genetic equilibrium. There are always going to be mutations occurring from time to time.
Asexual reproduction limits diversity?
asexual reproduction has a way of mutating bad genes. even beneficial mutations will become extinct if trapped along with genes that reduce the fitness of the population.
What are some sources of variation in a population?
variations in a population can be due to sexual reproduction, gene mutations, etc
How does migration affect the genetic equilibrium of a population?
Migration affects the genetic equilibrium of a population by maintaining it.
What characteristics of a population would most likely indicate the lowest potential for evolutionary change in that population?
Asexual reproduction and few mutations
Other sources of genetic variation in a population are?
Mutations (ubiquitous) and genetic recombination (sexual reproduction only).
What process in cells undergoing meiosis increases genetic diversity?
Sexual reproduction increases genetic diversity by introducing new genetic material.
Evaluate the significance of mutations and repair of mutations to the evolution of sexual reproduction?
evaluate the significance of mutations and repairof mutations to the evolution of sexual reproduction
What is the drawback of asexual reproduction?
Inbreeding makes organisms vulnerable to extinction by one pathogen spreading throughout identical offspring. Sexual reproduction adds genetic diversity and some mutations may give immunity to a few offspring who then become the progenitors of the next generations.
Does asexual reproduction contribute to sexual variation?
No. Asexual reproduction provides no diversity, as it creates an exact copy of the organism. Sexual reproduction, on the other hand, provides diversity by using and combining different genes each time to create an entirely new version of the organism.
Which two factors provide the genetic basis for variation within a species?
mutations and sexual reproduction (due to random orientation of bivalents about the equatorial spindle during metaphase I and pairs of chromatids during metaphase II; fusion of male and females gametes during fertilization; and reciprocal crossing over)
Do Organisms produced as a result of binary fission exhibit a great deal of genetic variation?
No. Binary fission is cloning and the genetic diversity that results from this is nil. Excepting the occasional copying errors we cal mutations, but nowhere near the genetic diversity given by sexual reproduction and genetic recombination.
The explanation for the diversity seen in nature is?
Natural slection acting on mutations
