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Why does height in humans have such a wide variety in phenotypes?
Height in humans is influenced by a combination of genetic, environmental, and nutritional factors. Genetic variations in multiple genes interact with environmental factors such as diet, health, and living conditions to produce a wide range of phenotypes. This complex interaction results in a diverse range of heights observed among individuals.
What is the population of an Ocelot?
The population of ocelots varies by region, but overall they are considered near threatened with an estimated population of around 50,000 individuals. Loss of habitat, hunting, and fragmentation of their range are major threats to their population.
How many moose are in the moose population?
The exact number of moose in a population can vary, but on average, a typical moose population may range from a few hundred to a few thousand individuals. Population numbers are influenced by factors such as habitat availability, food availability, predation, and disease.
What is veriation?
It appears there might be a typo in your question. If you meant "variation," it refers to differences or changes in something, such as characteristics, attributes, or outcomes, compared to a standard or a previous state. Variation can occur in a wide range of contexts, from genetics to statistics to quality control.
Explain why there is more variation between a species than within a species?
Within a species, the animals breed together so that the similar characteristics are passed from parents to their offspring. This is why there is less variation within a species than between a species.
What kind of variation must exist in population that has a wide range of phenotype?
Gene Flow
What is a result of polygenic inheritance?
Polygenic inheritance results in traits that are controlled by multiple genes, leading to a wide range of possible phenotypes within a population. This can contribute to continuous variation in traits such as height, skin color, and intelligence.
What modes of selection leads to a reduction in variation but no change in the mean?
Stabilizing selection is the mode of selection that can lead to a reduction in variation without changing the mean of a trait. In this type of selection, extreme phenotypes are selected against, while intermediate phenotypes are favored, resulting in a narrower range of phenotypic variation but maintaining the same mean.
Stabilizing selection results in more or less genetic diversity?
Stabilizing selection typically results in less genetic diversity because it selects against extreme phenotypes, narrowing the range of traits present in a population. This leads to the preservation of intermediate phenotypes that are favored by the selective pressures, reducing overall genetic variation.
What phenotype distribution pattern is common with polygenic inheritance?
A continuous variation of phenotypes is common with polygenic inheritance, often resulting in a bell-shaped curve known as a normal distribution. This means that individuals will exhibit a range of phenotypes with no clear-cut categories.
What is a natural variation in a population?
Look at a population of humans. Your class will do. Now, how many different heights, hair colors and other assorted phenotypic variations can you see in this small population?This is the frequency of alleles of these types that we call natural variation.
Which type of natural selection occurs when the extreme opposites in a phenotype range are selected?
Disruptive selection occurs when the extreme phenotypes in a population are favored over intermediate phenotypes. This can lead to the divergence of a population into two distinct groups with different traits.
When stabilizing selection acts to elimination extremes at both ends of a range of phenotypes the frequencies of the intermediate phenotypes increase?
Yes, when stabilizing selection is acting, individuals with extreme phenotypes are selected against, leading to an increase in the frequencies of intermediate phenotypes within a population. This process helps to maintain the overall consistency of a particular trait or characteristic over successive generations by favoring individuals with traits closer to the population average.
What term is used by biologists to describe the differences within a population with respect to features such as height?
The term used by biologists to describe the differences within a population with respect to features such as height is "variation". Variation refers to the range of different traits or characteristics that individuals within a population exhibit, including height.
Tends to favor phenotypes at one extreme of the range of variation?
This is called directional selection, where the environment selects for individuals with traits at one extreme of the phenotypic range. Over time, this can lead to a shift in the average phenotype toward that extreme.
When stabilizing selection acts to eliminate extremes at both ends of a range of phenotypes the frequencies of the intermediate phenotypes increase or decrease?
Increase, of course.
Directional selection tends to eliminate?
Directional selection tends to eliminate individuals at one extreme of a trait spectrum, favoring those at the opposite extreme. Over time, this can lead to a shift in the average value of the trait within a population.
