Give brief definitions or unique descriptions of the following terms:<\/p>\n
A) neutral drift<\/p>\n
B) sickle cell trait<\/p>\n
C) secondary structure<\/p>\n
D) torsion angle<\/p>\n
E) domain<\/p>\n
F) quaternary structure<\/p>\n
Answer: <\/span><\/strong><\/p>\n A) Neutral drift:<\/span><\/p>\n It is a process in population genetics that majors in the randomness of a change in allele frequencies where the change does not have any effect on the fitness of an organism. This again can cause variation within populations and in the long run fixation of neutral alleles might occur. One such event that brings change to the evolution process, is the neural drift that happens particularly more in small groups of evolution and produces the changes that are not a result of Natural selection.<\/span><\/p>\n B) Sickle cell trait:<\/span><\/p>\n Sickle cell trait on the other hand is one gene which one inherits but the other gene is normal hemoglobin. People with this engaging trait neither have complications of sickle cell disease but are capable of causing the gene to the upcoming generation. However, one should not confuse pathologic adaptation with protection since the sickle cell trait provides certain protection against malaria, which is why this gene is much more widespread in the territories where this tropical disease is widespread.<\/span><\/p>\n C) Secondary structure:<\/span><\/p>\n Secondary structure can be defined as the somewhat limited or usual twist of the polypeptide chain of a protein. Common types of secondary structures are alpha helices and beta sheets and the structure is stabilized by hydrogen bonds between the backbone atoms of the polypeptide bonds. They are the basic unit of the gross structure of the protein molecules and an ingredient in determining the functions and stability of the majority of the proteins.<\/span><\/p>\n