Biology Biology Practice Problems Solutions Library

Genetic Variation Solutions Library

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41 solutions

Genetic Variation

Q. Why does meiosis result in more genetic variation than can be explained by mutation alone? Select all that apply.A. because of the events of meiosi...

Solved • Sep 14, 2018

Genetic Variation

Q. Single nucleotide polymorphismsA. are often found in humansB. are rarely found in humansC. arise from gene duplicationsD. arise from transposonsE. ...

Solved • Aug 10, 2018

Genetic Variation

Q. Which definition of evolution is correct and complete?A. Evolution is the survival of the fittest over generations.B. Evolution is the change in fi...

Solved • Aug 9, 2018

Genetic Variation

Q. Can genetic drift lead to adaptations? Why or why not?

Solved • Aug 1, 2018

Genetic Variation

Q. Describe the two ways the genetic variation is increased through meiosis and indicate during which stage of meiosis the process occur. 

Solved • Jul 26, 2018

Genetic Variation

Q. Which of the following is false?A. If a genetic disease reduces fertility and the allele that causes the disease offers no other advantage, the all...

Solved • Jul 23, 2018

Genetic Variation

Q. The only source of new alleles in species is _________.A. mitosisB. mutationC. speciationD. genetic driftE. sexual reproduction

Solved • Jul 6, 2018

Genetic Variation

Q. Identify the three major events/processes that result in genetic variation between parents and offspring.

Solved • Jul 3, 2018

Genetic Variation

Q. A mutation that changes a glutamate is found to lead to a loss of activity in a protein. However, activity is regained when a second mutation at a ...

Solved • Jun 12, 2018

Genetic Variation

Q. Refer to the figure below. Which description of the gene pool shown is correct?a. Size of gene pool = 30b. Frequency of X1= 0.80c. Population size ...

Solved • May 31, 2018

Genetic Variation

Q. One spring, a dust storm blankets the usually green garden where a species of fraggles forage for food in gray dust. Under these conditions, the gr...

Solved • Dec 4, 2017

Genetic Variation

Q. A population ecologist observes that the surface area of leaves in a species of dandelion growing in a desert is much smaller compared to the large...

Solved • Dec 4, 2017

Genetic Variation

Q. When imbalances occur in the sex ratio of sexual species that have two sexes (i.e., other than a 50:50 ratio), the members of the minority sex ofte...

Solved • Oct 13, 2017

Genetic Variation

Q. Which of the following is most likely to have been produced by sexual selection?a. camouflage coloration in animalsb. a male lion's manec. differen...

Solved • Oct 13, 2017

Genetic Variation

Q. Cattle breeders have improved the quality of meat over the years by which process?a. directional selectionb. artificial selectionc. stabilizing sel...

Solved • Oct 13, 2017

Genetic Variation

Q. Through time, the movement of people on Earth has steadily increased. This has altered the course of human evolution by increasing _______.a. nonra...

Solved • Oct 13, 2017

Genetic Variation

Q. Crickets living high on a mountain have a high frequency of alleles for cold tolerance. Storms frequently blow crickets off the mountain down to lo...

Solved • Aug 3, 2017

Genetic Variation

Q. In the sage grouse males congregate at areas called leks. Females visit leks and move around, observing the displays of different males. Eventually...

Solved • Aug 3, 2017

Genetic Variation

Q. Which type of evolutionary force can maintain genetic variation?a. directional selection  b. stabilizing selection   c. genetic driftd. mutation      

Solved • Aug 3, 2017

Genetic Variation

Q. Which of the following is a correct definition of gene flow (migration)?a. random change in allele frequency over timeb. movement of alleles betwee...

Solved • Aug 3, 2017

Genetic Variation

Q. In crossbill birds the beaks have a specialized shape to allow the crossbills to extract pine seeds out of cones. Crossbills in one forest feed on ...

Solved • Aug 3, 2017

Genetic Variation

Q. Without genetic diversity, a population might more easily fall victim to parasites and pathogens. a. Trueb. False

Solved • Jul 28, 2017

Genetic Variation

Q. The North American bison was hunted to near extinction in the 1800s, and has since recovered, but with decreased genetic diversity. This is an exam...

Solved • Jul 20, 2017

Genetic Variation

Q. The few ancestors of the Galapagos finches who colonized the islands would be an example of: a.  A bottleneckb.  Natural selectionc.  Increased mut...

Solved • Jul 20, 2017

Genetic Variation

Q. The bottleneck effect: a.  Occurs when many members of a population die, resulting in a great loss of genetic diversityb.  Occurs when many members...

Solved • Jul 20, 2017

Genetic Variation

Q. The founder effect: a.  Occurs when large groups of individuals leave their home population and establish new settlements, mating only among themse...

Solved • Jul 20, 2017

Genetic Variation

Q. A male peacock has enormous tail feathers that it uses in mating displays to attract females. While the tail feathers are an advantage in mating, w...

Solved • Jul 20, 2017

Genetic Variation

Q. Alleles conferring red plumage to cardinal males are common because red plumage: a.  Makes males less susceptible to predationb.  Is helpful in att...

Solved • Jul 20, 2017

Genetic Variation

Q. Carriers of cystic fibrosis have some protection against intestinal infections such as cholera. However, people with two copies of the cystic fibro...

Solved • Jul 20, 2017

Genetic Variation

Q. Ancestors of the Galapagos finches had two different types of seeds to eat on some islands. Some seeds were very small, and required small beaks to...

Solved • Jul 20, 2017

Genetic Variation

Q. Ancestors of giraffes with shorter necks could not reach branches high up in trees for food. This led to ____ for longer necked giraffes. a.  Stabi...

Solved • Jul 20, 2017

Genetic Variation

Q. Babies that are at a low birth weight are more likely to have health problems, while women will have difficulty delivering babies with high birth w...

Solved • Jul 20, 2017

Genetic Variation

Q. One concern of conservation biologists is that endangered species will have low genetic diversity due to a small population size. Why is this a con...

Solved • Jul 20, 2017

Genetic Variation

Q. Sexually dimorphic features do not include:  a.  Colored plumage b.  Intelligence c.  Antlers d.  Body size e.  None are sexually dimorphic fe...

Solved • Jul 20, 2017

Genetic Variation

Q. The fact that individuals whose red blood cells break down more rapidly in an area where malaria is more prevalent have a better chance of reaching...

Solved • Jul 20, 2017

Genetic Variation

Q. "Balanced polymorphism" means that: a.  Many genes that affect the same trait persist indefinitely in a populationb.  Multiple alleles of a gene pe...

Solved • Jul 20, 2017

Genetic Variation

Q. The three types of natural selection are: a.  Directional selection, convergent selection, and disruptive selectionb.  Directional selection, artif...

Solved • Jul 20, 2017

Genetic Variation

Q. The mode of natural selection in which extreme phenotypes are less fit than the optimal intermediate phenotype is: a.  Directive selectionb.  Disru...

Solved • Jul 20, 2017

Genetic Variation

Q. The mode of natural selection in which two or more extreme phenotypes are fitter than the intermediate phenotype is: a.  Directive selectionb.  Sta...

Solved • Jul 20, 2017

Genetic Variation

Q. The mode of natural selection in which one extreme phenotype is fittest and the environment selects against the others is: a.  Directional selectio...

Solved • Jul 20, 2017

Genetic Variation

Q. The entire collection of genes and their alleles is a population's: a.  Genotypeb.  Phenotypec.  Dominant traitsd.  Recessive traitse.  Gene pool

Solved • Jul 20, 2017