In your simulation, a small population of six snails founded a new population. S
ID: 53293 • Letter: I
Question
In your simulation, a small population of six snails founded a new population. Suppose that the people had removed 50 snails from the original site (rather than six). Let’s assume that these 50 snails survived and reproduced on the new island. What effect would the larger sample size have on your results? Could you predict any shifts in the gene pool due to random genetic drift?
Now consider the two populations of snails living on a single island. Is it at all plausible that these populations might become reproductively isolated? If reproductive isolation does occur, describe some long-range consequences that you might expect to observe in the snail populations. If speciation were to occur on a single island, what types of adaptations might you expect to evolve in the WTSP predator population?
Explanation / Answer
1.Genetic drift , it is the change is frequency of the genetic variant in a population due to random sampling of the oragainsm .the allele in the offspring are sample of those in parents ,chance has a role in determining wether given individual survives and reproduces.
What effect would the larger sample size have on your results? Could you predict any shifts in the gene pool due to random genetic drift?
genetic drifts may cause gene varianats to disappear completely thereby reduce the genetic variation..random genetic drift occurs when an unpredictable variation changes the structure of the genepool ,the effect of the genetic drift minimizes when the size of the breeding population increases .The above situation of snails is said be in founder effect . founder effect is an example of the Random genetic drift . as the population of snails have randomly isolated form the gene pool. founder effect ,when an population splinteroff from original population and forms new one .in this type of effect it is even possible for the some genes in the original population is larger than the number of gene copies in he founders. making complete represntation impossible , this causes divergence significantly over the course of many years .
2. Reproductive isolation ; it is a process ,collections mechanisms , behaviours ,physiological process that prevent two members of species that cross or mate form producing offspring . they are two types of reproductive isolation one is prezygotic and other is post zygotic , the different mechanisms of reproductive isolation are genetically controlled . snails can be eproductivly isolated by the temporary barriers or habitat isolation it is certainly pluaisble for a species to be reproductively isolated becuas eof the seculation of the seperate parts of the island , the population go through the different forms of natural selection which may lead to inability of the reproduce with one another .if speciation went to occur then WTSP may develop a taste for the species rather than the original population to grow unchecked by the predators