The type of selection which is likely to occur on the following phenotypes:
Stabilizing selection: grey fur
Diversifying selection: dark fur on island and light on another island. Dark fur in forests and light in fields
Directional selection: dark and light fur
When individual people with such character traits generate more surviving offspring than individual people with other characteristics, this is referred to as phenotypic selection. Although selection is widely regarded as the primary driver of evolutionary change, scientists have only lately started to quantify its effects in the wild.
Because phenotype influences differential reproduction and survivorship, selection acts on phenotypes. If the phenotype influencing reproduction or survival rates is genetically determined, selection can indirectly winnow out genotypes by winnowing out phenotypes.
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One method is to microinject deoxyribonucleic acid (DNA) into eggs; another method is to use vortex mixing to create tiny holes in the eggs through which DNA enters.
<h3>Process of gene transfer</h3>
Genetic engineering techniques are steps that are taken to create a genetically modified organism that can be used for studies. This technique involves the following major steps:
- Isolation of DNA fragments from a donor organism,
- The insertion of an isolated donor DNA fragment into a vector genome; and
- The growth of a recombinant vector in an appropriate host.
The insertion of an isolated donor DNA fragment into a vector genome can be done through microinjection method or vortex mixing.
When eggs are used as vector genome, microinjection of DNA can be carried out or vortex mixing can be used to create tiny holes in the eggs through which DNA enters.
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Explanation:
Enzymes are proteins that act as catalysts. The shape of enzymes can be altered by changes
in pH or temperature. Explain how this change of shape affects the function of the enzyme.
Heat is caught in gases like methane and carbon dioxide and radiates back to earth. This causes the increase in temperature we call global warming.
Sulfurous emissions emitted in the atmosphere are carried by prevailing winds and cause acid rain in the Earth.
Sulfurous and nitric emissions in the atmosphere (mainly from the burning of fossil fuels, and partially from natural events), are transported by the winds and air currents, and they can travel for hundreds, or even thousands of kilometers, and they combine with the water, oxygen, and other particles, thus creating an acid rain.
