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The figure looks at the three modes of selection in a mouse population with a range of fur color phenotypes. different modes of selection are seen under different sets of environmental conditions, and each mode has a different effect on the population. (note that the white arrows indicate phenotypes that are selected against -- phenotypes that are less successful in surviving and reproducing -- in each mode of selection.

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The most common phenotype in a natural population is called the wild type. It is usually used as a benchmark or a standard for comparison with other phenotype or genotypes. In definition, wild type is a characteristic that is dominant among all individuals in natural conditions. In other words, it is a typical mutant type.
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Phenotype is a blend of different physical qualities and ecological impacts. If variation comes in a population it is because of natural impacts alone, any preferred position won't be passed on to the next generation. So characteristic choice follows up on phenotype, yet it is the association with genotype that makes it the instrument of advancement.

Further explanation

Phenotype

Physical appearance of an organism is called it phenotype. For example, fur color in mouse population.

Natural selection

It is a process whereby creatures better adjusted to their condition will in general endure and successfully produce new young ones. Charles Darwin was the first who represent this theory and it is presently viewed similar to the fundamental procedure that realizes development.

Mode of natural selection

There are three modes of natural selection which are given below.

1. Directional selection

It can be defined as a mode of natural selection when an extreme phenotype is favored upon other phenotypes and it causes the allele frequency shift respect to time with in the direction of that phenotype.

2. Disruptive selection

It is also called diversifying selection and it can be described as genetic changes in population which are extreme values for a trait and are favored over intermediate values.

3. Stabilizing selection

It is a type of natural selection that maintains the constancy of a species over successive generations. It involves selection against phenotypes for a particular characteristic.

Phenotype in mouse

Fur color defines its phenotype and mouse vary according to fur color or phenotype. Wild type is a common form of phenotype.

Answer details

Subject: Biology

Level: High school

Key words

  • Phenotype
  • Natural selection
  • Mode of natural selection
  • Directional selection
  • Disruptive selection
  • Stabilizing selection
  • Phenotype in mouse

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