Bottleneck events are always caused by the death of most of a species’ population.
Orange trees planted in a grove or orchard would most likely fall in which category of population distribution?
Which of the following conditions would lead to a small population size?
Explain how a bottleneck event can enrich recessive traits in the genetics of a population.
A bottleneck event severely reduces the fraction of a species able to pass on their genes to offspring. Any once rare recessive traits present in the surviving breeding population are passed to a larger fraction of the total population of offspring, thereby enriching those recessive traits in the total gene pool.
How do natural disasters contribute to genetic drift?
How do the biotic and abiotic limiting factors of an ecosystem determine its carrying capacity?
How does population density differ from population size?
Population size looks at the total number of organisms in a population. Population density, however, looks at the total number of organisms in a given area. A population with a small number of organisms can have a higher population density than a larger population if they live in a very small area. For example, the overall population of the United States is greater than the population of Japan, but Japan’s population density is greater.
Population density is calculated by _______.
Identify the abiotic limiting factor from the choices below.
Explain why random distribution patterns for species are the rarest in nature.
According to the theory of island biogeography, those islands that are further isolated from the mainland and other islands would be expected to have _______.
Polydactylism occurs _______.
Explain why a population of Mouflon in the Indian Ocean descended from only two individual that had not experienced a loss of genetic diversity was so surprising to scientists.
When populations are dramatically reduced in size, the theory of genetic drift suggests that a loss of genetic diversity should be expected. In the case of the Mouflon, however, no such loss in diversity was observed. This result was extremely surprising to scientists because it meant that the theory of genetic drift does not always hold true.
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