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crossing-over

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<b>Crossing</b> <b>over</b>.   Figure 4. <b>Crossing</b> <b>over</b>.
Published: 01 April 2017
Figure 4. Crossing over. Figure 4. Crossing over. Figure 4. Crossing over. Figure 4. Crossing over. More
Journal Articles
The American Biology Teacher. 2017; 794305–308 doi: https://doi.org/10.1525/abt.2017.79.4.305
Published: 01 April 2017
...Figure 4. Crossing over. Figure 4. Crossing over. ...
Journal Articles
The American Biology Teacher. 2019; 8113–10 doi: https://doi.org/10.1525/abt.2019.81.1.3
Published: 01 January 2019
... his claim that “wide race crosses” were a danger that should be blocked on genetic grounds, Davenport needed better evidence. So he went looking for “disharmonies” in the only place he knew where interracial matings had been sufficiently common over a long enough time to provide abundant research...
Journal Articles
The American Biology Teacher. 2020; 824201–208 doi: https://doi.org/10.1525/abt.2020.82.4.201
Published: 01 April 2020
...., 2017 ). However, many high schools, particularly large schools serving urban populations, are faced with issues of inadequate funding, over-enrollment, lack of laboratory resources, and lack of proper teacher training. Several recent reports have addressed the need to reform science education at...
Journal Articles
The American Biology Teacher. 2020; 823142–148 doi: https://doi.org/10.1525/abt.2020.82.3.142
Published: 01 March 2020
... critical process that mediates nutrient availability, accumulation of organic matter, and carbon storage over long time scales. As an example of an integrative ecosystem function, decomposition illustrates the temporal and spatial scales at which ecosystems operate. In both aquatic and terrestrial...
Journal Articles
The American Biology Teacher. 2020; 823162–169 doi: https://doi.org/10.1525/abt.2020.82.3.162
Published: 01 March 2020
... interdisciplinary team of three, in partnership with the gallery's director, Victoria Cooke, planned and implemented this exhibition over the course of a year. The result was Tiny Enormous , a month-long art–science exhibition of both visual evidence and imaginative interpretations of microorganisms. Art using...
Journal Articles
The American Biology Teacher. 2020; 822120–122 doi: https://doi.org/10.1525/abt.2020.82.2.120
Published: 01 February 2020
... on Earth shows amazing adaptations developed over evolutionary time, and skeletal adaptations of tetrapods provide many examples. Figure 2. Bones Race checklist. Figure 2. Bones Race checklist. In the typogram activity, each student is given the name of a different animal, which I...
Journal Articles
The American Biology Teacher. 2020; 822104–112 doi: https://doi.org/10.1525/abt.2020.82.2.104
Published: 01 February 2020
... university level, presenting evolution as a coherent and unifying principle of biology has faced a wide array of challenges and missteps over past decades (reviewed in Alters & Nelson, 2002 ; Rutledge & Mitchell, 2002 ; Friedrichsen et al., 2016 ). Traditional pedagogical approaches have involved...
Journal Articles
The American Biology Teacher. 2020; 82272–79 doi: https://doi.org/10.1525/abt.2020.82.2.72
Published: 01 February 2020
... that they found to yield radiocarbon “ages” of over 40,000 years ( Fields et al., 1990 ; Helfinstine & Roth, 2007 ; Thomas & Nelson, 2015 ) are much older than 40,000 years, which contradicts their own assertion that the Earth and the ancestors of all the life-forms on it came into existence...
Journal Articles
The American Biology Teacher. 2019; 819644–648 doi: https://doi.org/10.1525/abt.2019.81.9.644
Published: 01 December 2019
... the skin. Using a small spatula, gently scrape the flesh of each potato slice and quickly smear a thin coat on a slide. Place a drop of water over the smear and cover with a cover slip. Observe with both bright-field and polarized light. You will be able to clearly observe a “Maltese cross” ( McMahon...
Journal Articles
The American Biology Teacher. 2019; 818599–604 doi: https://doi.org/10.1525/abt.2019.81.8.599
Published: 01 October 2019
... disguise. Melanocytes active over the entire surface eclipse the underlying rosette pattern. Using infrared light, however, one can still detect the spots ( Figure 11 ) ( Hedges et al., 2015 ). Here, we notably encounter a vestige of the past, which helps to document the change that occurred. One can also...
Journal Articles
The American Biology Teacher. 2019; 818543–552 doi: https://doi.org/10.1525/abt.2019.81.8.543
Published: 01 October 2019
... familiarize them with geological times and divergences. Have students turn in their drawings and workbook. The workbook should be assessed on the level of completion. Rather than a rubric, it is easier to “eyeball” the work, to see if students applied the drawing/noticing instructions when looking over...
Journal Articles
The American Biology Teacher. 2019; 817503–506 doi: https://doi.org/10.1525/abt.2019.81.7.503
Published: 01 September 2019
... ; Lampert, 2015 ; Poppenwimer et al., 2015 ). The economic growth of China over the past several decades has led to an increase in trade with the United States, and with that increase in trade has come an increase in opportunities for movement of invasive species ( Ding et al., 2008 ). Because our...
Journal Articles
The American Biology Teacher. 2019; 817492–501 doi: https://doi.org/10.1525/abt.2019.81.7.492
Published: 01 September 2019
... polymerase chain reaction to detect Coccidioides spp. in DNA extracts from soil samples collected by students across different soil environments. Additionally, this exercise will teach students how to use publicly available data to investigate disease incidence over time and characterize soils the pathogen...
Includes: Supplementary data
Journal Articles
The American Biology Teacher. 2019; 816454–456 doi: https://doi.org/10.1525/abt.2019.81.6.454b
Published: 01 August 2019
... over the last twelve years. Her interests include evolutionary biology, science and religion, and the intersections of science and society – specifically where scientific understandings are deemed controversial by the public. Glaze holds degrees in science education from the University of Alabama and...
Journal Articles
The American Biology Teacher. 2019; 816435–441 doi: https://doi.org/10.1525/abt.2019.81.6.435
Published: 01 August 2019
... coefficient D to diffuse in solution over the distance x in one dimension: t ≈ x 2 2 D Repeat the calculation performed in step 1, now for the Schematic Synapse Model, by assuming the distance between the apposed membranes to be 500 nm. For both the Morphometric Synapse and the...
Journal Articles
The American Biology Teacher. 2019; 816417–422 doi: https://doi.org/10.1525/abt.2019.81.6.417
Published: 01 August 2019
... climatogram B as indicative of “temperate” climates relatively easily. Students essentially begin their modeling by proposing explanations of the phenomenon of the different climates (here defined by average precipitation and temperature over a year) in tropical and temperate regions. Although instructed...
Includes: Supplementary data
Journal Articles
The American Biology Teacher. 2019; 815366–371 doi: https://doi.org/10.1525/abt.2019.81.5.366
Published: 01 May 2019
... calculations are required for proper application. Third, the principle, assumptions, and calculations are often taught separately from students observing population changes over time. We describe a classroom activity in which students investigate how the allele frequencies of soft-shell clam (Mya arenaria...
Journal Articles
The American Biology Teacher. 2019; 815317–325 doi: https://doi.org/10.1525/abt.2019.81.5.317
Published: 01 May 2019
... regarding the figure and how the data are being represented. Because students are presented with more information, their cognitive processes may involve the generation of fewer hypotheses and require less cross-referencing with their prior knowledge. The FotD activities took place over eight weeks...
Journal Articles
The American Biology Teacher. 2019; 814297–298 doi: https://doi.org/10.1525/abt.2019.81.4.297
Published: 01 April 2019
...Richard Lord AMANDA L. GLAZE is an Assistant Professor of Middle Grades and Secondary Science Education at Georgia Southern University in Statesboro, Georgia. In addition to science teacher education, she has taught courses in biological sciences for grades 7–12 and undergraduate students over...