In certain areas of Africa, the sickle cell mutation has a high frequency because it confers an adaptive advantage against malaria which is endemic to this region.
<h3>What is natural selection?</h3>
Natural selection is a mechanism that drives evolution in natural populations, which in case we are observing stabilizing selection because it acts to stabilize the frequency of different alleles.
In certain regions in the African continent, the sickle cell mutation exhibits a high frequency since it is able to confer resistance against malaria which is an endemic disease located in this region.
Therefore, with this data, we can see that stabilizing selection acts to increase the frequency of the sickle cell mutation, which is harmful in regions where malaria is not endemic but increased in certain parts of Africa due to the incidence of malaria, thereby being an adaptive trait for these geographic areas.
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Major histocompatibility complex are the gene alleles that influenced their odor preference.
Major histocompatibility complex (MHC), are group of genes found in mammals. Major histocompatibility complex codes for proteins that are present on cells surfaces and assist the acquired immune system to recognize foreign molecules. The primary role of MHC molecules is to attach to antigens obtained from pathogens and show them on the cell surface for recognition by the suitable T-cells.
Answer:
Viruses are neither prokaryotes nor eukaryotes because they lack all of the characteristics of living things except for the ability to reproduce. They are considered parasitic because they cannot live or replicate without a living host. Viruses consist of genetic material (either DNA or RNA), a protein coat, and sometimes a lipid envelope surrounding the protein coat. They have no function except to reproduce.
