Over multiple generations of reproducing, a larger proportion of the population will have those favorable traits and thus adaptation has occurred. b. People select which individuals breed and which ones do not. Which of the following would not result in a decrease of genetic variation? a. breeding occurs between two different species.
Each gamete contains two genes for each trait. Traits that are controlled by several sets or pairs of alleles, such as skin color and height in humans, are the result of what form of inheritance? Ryan has type A blood and is color-blind (an X-linked recessive trait). Which of the following combinations are possible for his parents?
The recovered population shows less genetic diversity than the population prior to the bottleneck. b. The recovered population is as likely to go extinct as is the population prior to the bottleneck.
The population produces more offspring than the environment can support. d. Individuals who have favorable traits survive and reproduce more than those individuals lacking such traits. e. Over multiple generations of reproducing, a larger proportion of the population will have those favorable traits and thus adaptation has occurred. b.
Answer and Explanation: The answer is C. Mitosis of fertilized eggs. Mitosis of fertilized eggs is not a source of genetic variation.
Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
The genetic diversity has three different sources: mutation, recombination and immigration of genes. Mutation is the driving force of genetic variation and evolution.
Recombination is a process by which pieces of DNA are broken and recombined to produce new combinations of alleles. This recombination process creates genetic diversity at the level of genes that reflects differences in the DNA sequences of different organisms.
Answer. Answer: examples of genetic variation include eye colour ,blood type ,camouflage in animals and leaf modification in plants.
In fact, according to the most recent study, published last week in the journal Current Biology, the San Nicholas Island fox (U.l. dickeyi) may have the lowest genetic variability of any other wild animal species on the planet.
Three sources of genetic variation are mutation, genetic recombination during sexual reproduction, and lateral gene transfer.
They are: mutation, non-random mating, gene flow, finite population size (genetic drift), and natural selection.
So, the correct answer is 'Independent assortment of genes'.
Crossing over or recombination is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent contributing to genetic diversity.
Genetic variation occurs as alleles in gametes are separated and randomly united upon fertilization. The genetic recombination of genes also occurs during crossing over or the swapping of gene segments in homologous chromosomes during meiosis.
Genetic variation describes naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing environmental circumstances.