Clines in body size have been observed in many species, such as the latitudinal cline in moose shown in Figure 8.2 (shown in the previous question). How might you determine whether a cline in body size was caused by clines in allele frequencies? Which of the following is NOT one of the strategies to test this? Group of answer choices A.) Measure and assess the morphological character in multiple individuals along the cline and statistically compare them for significant differences. B.) Swap individuals or seeds from one end of the cline with those at the other end of the cline, and vice-versa, and then measure and assess how they grow. C.) Grow or raise individuals from different parts of the cline under the same conditions, in a common garden experiment, and then measure and assess how they grow. D.) Identify the genes coding for that morphological character, sequence them in multiple individuals across the cline, and then compare them for variation in sequence, structure, and/or function.
Gene Flow
Gene flow, also known as gene migration, is the introduction of genetic material from a particular population to another population of the same species through interbreeding. For example, a bee facilitates its reproductive process by carrying pollen from one flower to another. The flow alters the composition of the gene pool of the receiving population. It introduces new alleles within the population and helps increase variability. This exchange of genetic material occurs through reproduction and brings about new combinations of traits into the population. Where human beings are concerned, actual migration of populations, whether voluntary or forced, brings about gene flow.
Population Biology
Population biology is the study of patterns in organism populations, specifically the growth and management of population size, population genetics, the evolution of life history, species interactions, and demography.
Speciation
The process of speciation involves the formation of new species during evolution. The new species evolve in such a way that both new and old species are not able to interbreed. Thus, speciation occurs when few members of one species get separated from the main species due to geographical, mechanical, or reproductive isolation. These separated members develop new traits that make them different from the main species. In other words, speciation could be defined as the absence of gene flow between two populations that become new species.
Allele Fixation
A gene is a unit of heredity and contains both physical and functional information that shapes an individual. Genes are made up of DNA (deoxyribonucleic acid), which carry genetic information from one generation to another, from one set of parents to their offspring, and so on. Every cell in a human body, or any living organism, has the same DNA, which implies that every cell in an individual’s body has all the information it needs to build and sustain the body!
Clines in body size have been observed in many species, such as the latitudinal cline in moose shown in Figure 8.2 (shown in the previous question).
How might you determine whether a cline in body size was caused by clines in allele frequencies? Which of the following is NOT one of the strategies to test this?
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