WorksheetsGenetic Drift
Total questions: 15
Worksheet time: 10mins
What is genetic drift?
the changes in allele frequencies (genes) ,in a population, happening due to random events/circumstances.
It is an example of primary succession
Genetic drift are different organisms in a population due to inherited traits from their parents
It is part of symbiotic relationships such as mutualism, commensalism, parasitism
All of the genetic information found in a population.
population
genetic drift
evolution
gene pool
What characteristic did Darwin observe about the finches on the Galapagos Islands?
Their feathers
Genotypes
Their beaks
Their body sizes
Which of the following is an example of the bottleneck effect?
Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.
Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.
The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.
Humans choose two dogs they like the characteristics of and breed them together.
Hunting reduced the population size of the northern elephant seal to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000, but much have less genetic variation than a population of southern elephant seals that were not intensely hunted. How is the lack of genetic variation related to the hunting episodes of the 1800's?
Genetic Drift Occurred/Genetic Bottleneck: the few individuals left behind were the seals that passed on the specific gene pool.
Genetic Drift Occurred/Founder Effect: the few individuals left behind were the seals that passed on the specific gene pool.
Natural Selection Occurred/Survival of the Fittest: only the strongest northern elephant seals survived in the 1800's and that restricted gene pool exists today.
Adaptation Occurred: Some seals were able to adapt to the hunting environment and they survived to pass on their genes.
In Genetic Drift, both Genetic Bottleneck and the Founder Effect, the end result is
less genetic diversity withing a population
a smaller population size
a new gene pool created by random chance
a population of organisms that are best fit for their environment
The small seeded plants in an area were killed by a fungus. Finches with a small beak cannot crack open the large seeds from the plants that were left. What type of selection is likely to occur?
directional selection
stabilizing selection
disruptive selection
artificial selection
A population of rabbits has three fur colors: white, gray, and black. After volcanic activity, the terrain changed and now the rabbits now live on white rocks and black rocks. What type of selection is likely to occur?
directional selection
disruptive selection
stabilizing selection
artificial selection
