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sexual-dimorphism

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Fathead minnow <b>sexual</b> <b>dimorphism</b>. (A) Adult male fathead minnow in breeding...
Published: 01 March 2013
Figure 1. Fathead minnow sexual dimorphism. (A) Adult male fathead minnow in breeding condition, showing tubercles, epithelial “fat” pad, and vertical banding pattern along the body. (B) Adult female fathead minnow, typically smaller than mature males, and lacking tubercles, epithelial pad, and Figure 1. Fathead minnow sexual dimorphism. (A) Adult male fathead minnow in breeding condition, showing tubercles, epithelial “fat” pad, and vertical banding pattern along the body. (B) Adult female fathead minnow, typically smaller than mature males, and lacking tubercles, epithelial pad, and More
Journal Articles
The American Biology Teacher. 2017; 792135–143 doi: https://doi.org/10.1525/abt.2017.79.2.135
Published: 01 February 2017
... dimorphism, and speciation. It also provided interesting examples that can be used to engage students in learning about evolution. Here we review the latest sexual selection research and propose two activities that model evolution by sexual selection. The engaging nature of these activities makes them useful...
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Diagram representing the different stages of the activities. To test studen...
Published: 01 February 2017
Figure 1. Diagram representing the different stages of the activities. To test students’ hypotheses, you will need to contrast the results obtained by varying the parameter hypothesized to explain the observed patterns of sexual dimorphism while keeping other parameters constant. Figure 1 Figure 1. Diagram representing the different stages of the activities. To test students’ hypotheses, you will need to contrast the results obtained by varying the parameter hypothesized to explain the observed patterns of sexual dimorphism while keeping other parameters constant. Figure 1 More
Journal Articles
The American Biology Teacher. 2018; 808561–569 doi: https://doi.org/10.1525/abt.2018.80.8.561
Published: 01 October 2018
... RNAi, we would expect only minimal effects on the hindwings. Background . Some of the most spectacular examples of sexual dimorphism are found within insects. For example, most males of the dung beetle genus Onthophagus develop a wide variety of prominent extrusions (“horns”) on the head and/or...
Journal Articles
The American Biology Teacher. 2017; 799787–791 doi: https://doi.org/10.1525/abt.2017.79.9.787
Published: 01 November 2017
... Seed germination............................1:55-TT, 5:407-TT Self-directed inquiry investigations............................3:200-I Service leaning............................5:393-I Sexual dimorphism............................2:137-I Sexual selection............................2:137...
Journal Articles
The American Biology Teacher. 2017; 796438–441 doi: https://doi.org/10.1525/abt.2017.79.6.438
Published: 01 August 2017
..., or talking to dog owners. Many invertebrates display even more dramatic sexual dimorphism and age dimorphism. Learning the natural history of a study species (whether wild birds, baboons, or fruit flies) is a critical early step in planning a project. The science fair community has been...
Journal Articles
The American Biology Teacher. 2017; 792144–148 doi: https://doi.org/10.1525/abt.2017.79.2.144
Published: 01 February 2017
... with the discovery and revelation of paradoxes—phenomena that, despite apparently sound reasoning, lead to a conclusion that seems senseless or illogical. Examples in nonhuman animals include extreme sexual dimorphism in peacock feathers ( Trivers, 1972 ), infanticide by male lions ( Hrdy, 1979 ), or...
Journal Articles
The American Biology Teacher. 2016; 789785–789 doi: https://doi.org/10.1525/abt.2016.78.9.785
Published: 01 November 2016
........................................ 5:370-F, 8:644-F Workload...............................................................8:684-TT Yeast........................................................................ 8:669-I Sensory ecology....................................................4:338-TT Sexual dimorphism...
Journal Articles
The American Biology Teacher. 2016; 784335–337 doi: https://doi.org/10.1525/abt.2016.78.4.335
Published: 01 April 2016
... content through the University of California Press's Reprints and Permissions web page, www.ucpress.edu/journals.php?p=reprints . 2016 Ecological and evolutionary principles independent online learning industrial melanism mimicry species characteristics sexual dimorphism Figure 1...
Journal Articles
The American Biology Teacher. 2016; 782109–117 doi: https://doi.org/10.1525/abt.2016.78.2.109
Published: 01 February 2016
... color of the wings, and that natural or sexual selection may be primarily responsible for this color's presence or absence. Structurally colored wing patterns have been described as species-recognition signals and as sexually dimorphic signals involved in female mate choice, and it has been shown that...
Journal Articles
The American Biology Teacher. 2015; 77299–106 doi: https://doi.org/10.1525/abt.2015.77.2.4
Published: 01 February 2015
... Arkhipkin, A.I., Bizikov, V.A. & Fuchs, D. (2012). Vestigial phragmocone in the gladius points to a deepwater origin of squid (Mollusca: Cephalopoda). Deep-Sea Research I , 61 , 109–122. Ashman, T.-L. (2003). Constraints on the evolution of males and sexual dimorphism: field estimates of genetic...
Journal Articles
The American Biology Teacher. 2014; 766417 doi: https://doi.org/10.1525/abt.2014.76.6.10
Published: 01 August 2014
... 53 lb), which qualifies them as the heaviest flying birds. Not so for females, however. Female great bustards are much smaller than males. This vast discrepancy in size “makes great bustards the unchallenged bird champions in terms of sexual size dimorphism. Other examples of extraordinary...
Journal Articles
The American Biology Teacher. 2014; 768493–498 doi: https://doi.org/10.1525/abt.2014.76.8.2
Published: 01 October 2014
..., 2002 ; Schlosser & Wagner, 2004 ; Callebaut & Rasskin-Gutman, 2005 ), either as the domains of individualized developmental processes ( developmental modules ) or as focal targets of natural or sexual selection ( evolutionary modules ). Analyzing the development or evolution of a strictly...
Journal Articles
The American Biology Teacher. 2014; 763160–170 doi: https://doi.org/10.1525/abt.2014.76.3.3
Published: 01 March 2014
... a common ancestor, and multiplication of species. They recognize that sexual selection is an evolutionary mechanism involved in this case, given the sexual dimorphism of Campephilus species as seen in images of male and female ivory-billed, imperial, and magellanic woodpeckers. In every class...
Journal Articles
The American Biology Teacher. 2013; 753203–209 doi: https://doi.org/10.1525/abt.2013.75.3.9
Published: 01 March 2013
...Figure 1. Fathead minnow sexual dimorphism. (A) Adult male fathead minnow in breeding condition, showing tubercles, epithelial “fat” pad, and vertical banding pattern along the body. (B) Adult female fathead minnow, typically smaller than mature males, and lacking tubercles, epithelial pad, and...
Journal Articles
The American Biology Teacher. 2012; 745303 doi: https://doi.org/10.1525/abt.2012.74.5.2
Published: 01 May 2012
... caption. Some appropriate questions from you are (1) “What does sexually dimorphic mean?”; (2) “If this is a male, what could the female look like?”; (3) “What is the environmental issue for turtles in general?”; (4) “How can the issue be addressed?”; and (5) “What research questions could be asked...
Journal Articles
The American Biology Teacher. 2013; 753214–218 doi: https://doi.org/10.1525/abt.2013.75.3.11
Published: 01 March 2013
... ; Messina, 1991 ). Males and females are sexually dimorphic. Females are larger and have a black abdomen with a white stripe down the center. By contrast, males have a brown abdomen ( Figure 1 ). Bean beetles are an excellent model system for use in undergraduate laboratory courses ( Blumer & Beck...
Journal Articles
The American Biology Teacher. 2013; 755330–334 doi: https://doi.org/10.1525/abt.2013.75.5.6
Published: 01 May 2013
... an adaptation of a species on your tour. Briefly explain the evolutionary history (or life history strategy) of a species on your tour. Explain and provide an example of sexual dimorphism on your tour. Genetics & molecular biology Determine the genetic basis of an observable trait on...
Journal Articles
The American Biology Teacher. 2012; 742106–110 doi: https://doi.org/10.1525/abt.2012.74.2.8
Published: 01 February 2012
... to the points representing different stages in chimpanzee development. If students choose sexually dimorphic measurements, they may have one curve for the female chimpanzee and another for the male. Students generally need to be reminded that the points for A. afarensis , H. erectus , and H...
Journal Articles
The American Biology Teacher. 2012; 743185–189 doi: https://doi.org/10.1525/abt.2012.74.3.11
Published: 01 March 2012
... standard preservative formulations. However, in our experience, preserved animals are far inferior to freshly euthanized animals. Begin with examination of external anatomy. This species’ sexual dimorphism makes determination of sex simple. Male MHCs have large bumps or horns on the pronotum ( Figure 1...