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C1. The four processes are cell division, cell differentiation, cell
C1. The four processes are cell division, cell differentiation, cell

... C25. Genes involved with cell differentiation and homeotic genes are similar in that they control genetic regulatory pathways. These types of genes typically encode transcription factors that regulate the expression of many genes. The main difference lies in the magnitude of the genetic control. My ...
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< 1 ... 1205 1206 1207 1208 1209 1210 1211 1212 1213 ... 1937 >

Microevolution

Microevolution is the change in allele frequencies that occur over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow, and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed 'macroevolution' which is where greater differences in the population occur.Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself with observing microevolution in the wild. Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution. Macro and microevolution describe fundamentally identical processes on different scales.
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