Mechanisms of Microevolution
This mechanism is any change in a DNA sequence
What is a mutation?
This mode of selection eliminates the extremes when the average expression leads to higher fitness.
What is Stabilizing Selection?
preserved remains or impressions of anonymous organisms.
What are fossils?
organisms better fit to survive in their environment will produce more offspring according to this mechanism.
What is Natural Selection?
The increase of expression of an extreme version of a trait in a population is this mode of selection.
What is Directional Selection?
Two different biological features that have different functions but share similar structures
What are homologous structures?
This is when a population randomly loses frequency of an allele over time.
What is genetic Drift?
A process that splits a population into two groups that favor two extremes is this mode of Selection.
Features but organs that have lost their function over one due to evolution.
What are vestigial structures?
The result of a population drastically decreasing in size.
What is the bottleneck effect.
Human babies born with below and above average weights having lower survival rates is an example of this mode.
What is Stabilizing Selection?
Anatomical features that have the same function but share no common origin.
What are analogous structures?
What is Genetic Equilibrium?
Moths with darker colored wings tended to blend in with tree bark and survive longer than the average light colored moth. Over time more dark colored moths began to appear. This is an example of this mode of selection.
What is Directional Selection?
The study of how organisms grow and develop from fertilization to birth.
What is Embryology?