Rakhee's+Group

__**Introduction**__
Polymorphism is when poor drafting an organism has the ability no, its when it does to exist with variation in phenotype no genotype, for example colour. This is due to two could be more different alleles being present where? in the species, population? for the one given gene locus? . There are many evolutionary processes that are a cause of different allele frequencies and hence phenotypes in a population. For example, genetic drift is the change in allele frequency in a population due to change no, chance. The effects of genetic drift are larger in small populations and smaller in larger populations. Gene flow is another evolutionary process which causes different allele frequencies. In this particular process, the alleles of genes are transferred from one population to another. This migration into or out of a population could be the reason for different allele frequencies being present in a population you'd need to explain why populations differ in the first place, or gene flow has no effect.

As polymorphism is clearly seen in Cepaea, a snail species, it makes this species an ideal organism to study. This is because they have a wide variety of banding patterns and colours within the one species, showing the presences of polymorphism circular logic. They have reduced locomotion you mean they don't move far over a generation? and their environment plays a huge role this is a conclusion, do we have evidence yet? in their phenotypic outcomes enabling us to analyse this species logic wrong, the envt's role does not enable us to study //Cepeae//. This is one reason why studies on snails are preferred in comparison to humans. Furthermore, the results obtained are also applicable to humans. It is also much easier to study snails on a larger scale and obtain results quickly why? . Another reason why snails are ideal for this study is because they have a simpler genome compared to that of humans who says? We don't have a full snail genome to my knowledge. Genome complexity does not correlate with phenotypic sophistication, for example many grasshoppers have genomes over 5x the human genome. For example, in humans, epitasis comes into play, where a presence of one gene determines the outcome of another gene this occurs in snails. As this doesn’t occur in snails, it makes it easier to make conclusions regarding genotypes and phenotypes why would you think that? Give a reference (its wrong anyway).

From doing this experiment we hope to find out whether or not there is a clear cut distinction of snails within the same species that live in two different habitats not the point,. Also, to determine if the polymorphism no, not the polymorphism, but the differences in allele frequency from one place to another in the species is due to genetic drift, gene flow, mutation or selection but how? . We conducted the experiment by doing three replicates in each of the chosen habitats which were the woodland area and the grassland area. The reason for taking three replicates in each area was to make sure that the findings were accurate and reliable not really, to distinguish the role of drift and selection. Also, taking more than one replicate showed whether there were any differences in the replicates of the area circular. Each replicate taken from the areas had a minimum of 20 samples each, so we were able to make sure that we had covered a wide range of phenotypes, of the snails, in the area how do you know that's enough? .

We believe that there would a higher count of darker coloured snails in the woodland area as opposed to the grassland area which would have a higher number of lighter coloured snails why? . An observation of a higher count of darker coloured snails in the grassland area as well as there being no distinct differentiation between different habitats contradicts previous point and the colour of snails this is not the point, the point is to distinguish the processes explaining the patters.

Group contributions: -Rakhee Chauhan -Shruti Chandorkar -Faiza Iqbal