1-20 of 188 Search Results for

recessive-alleles

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Articles
The American Biology Teacher. 1991; 53294–97 doi: https://doi.org/10.2307/4449229
Published: 01 February 1991
....). Philadelphia: W.B. Saunders Com- pany. Thompson 4 Genetics in medicine 1979 What Is a Recessive Allele? Werner G. Heim ONE of the commonly misunderstood and misin- terpreted concepts in elementary genetics is that of dominance and recessiveness of alleles. Many students in introductory courses...
Journal Articles
The American Biology Teacher. 2013; 759664–669 doi: https://doi.org/10.1525/abt.2013.75.9.7
Published: 01 November 2013
... functional (versus a rule-based) distinction between dominant and recessive alleles? It is our hope that by using these analogies, teachers at all levels of the K–16 curriculum can appeal to the common experience and common sense of their students, to lay a solid foundation for mastery of genetics and...
Journal Articles
The American Biology Teacher. 2014; 765306–310 doi: https://doi.org/10.1525/abt.2014.76.5.3
Published: 01 May 2014
... or not most human characteristics are inherited as simple Mendelian traits (determined by one gene with a dominant and a recessive allele), problems with the Central Dogma of Biology, misunderstandings about the inheritance of traits such as eye color, the relative importance of genetics versus the...
Journal Articles
The American Biology Teacher. 2010; 72112–15 doi: https://doi.org/10.1525/abt.2010.72.1.4
Published: 01 January 2010
...Andrea D. Plunkett; Lev Y. Yampolsky We propose an experimental model suitable for demonstrating allele frequency change in Drosophila melanogaster populations caused by selection against an easily scorable conditional lethal, namely recessive flightless alleles such as apterous and vestigial...
Images
Published: 01 November 2013
Figure 2. The recessive FPsc albino mutant allele prevents elaboration of the photosynthetic machinery (white segregants among the F2s shown above) if present in homozygous condition. Figure 2. The recessive FPsc albino mutant allele prevents elaboration of the photosynthetic machinery
Journal Articles
The American Biology Teacher. 2014; 769576–581 doi: https://doi.org/10.1525/abt.2014.76.9.2
Published: 01 November 2014
.... (1991). What is a recessive allele? American Biology Teacher, 53, 94–97. Ibraghimov-Beskrovnaya, O., Ervasti, J.M., Leveille, C.J., Slaughter, C.A., Sernett, S.W. & Campbell, K.P. (1992). Primary structure of dystrophin-associated glycoproteins linking dystrophin to the extracellular matrix...
Journal Articles
The American Biology Teacher. 2014; 763189–193 doi: https://doi.org/10.1525/abt.2014.76.3.7
Published: 01 March 2014
... principles of segregation and independent assortment of alleles are observed; dominant and recessive traits and tools students need to construct Punnett squares are apparent. Figure 1. The traits that correspond to the Cooties from east and west of the Sierra Madres mountain range and the colored...
Journal Articles
The American Biology Teacher. 2012; 745341–342 doi: https://doi.org/10.1525/abt.2012.74.5.11
Published: 01 May 2012
... genetic problems and predict phenotypes, because of improved understanding of dominance and recessiveness. Furthermore, this new concept has gained popularity among our dyslexic biology students who usually have difficulty in conceptualizing alleles and genes with alphabetical letters. In addition to...
Journal Articles
The American Biology Teacher. 2020; 822104–112 doi: https://doi.org/10.1525/abt.2020.82.2.104
Published: 01 February 2020
... . The chopsticks and spoons represent two beak-shape phenotypes that exist in a population of birds and that are expressed by dominant-recessive alleles. The students represent the birds. Have the students gather around the table and ensure that each has their designated “stomach” (i.e., sheet of...
Images
Published: 01 April 2018
Figure 3 Punnett square demonstrating the possible outcomes of a genetic cross in which each parent possesses one each of the dominant (A) and recessive (a) gene variants (alleles). Figure 3. Punnett square demonstrating the possible outcomes of a genetic cross in which each parent possesses
Journal Articles
The American Biology Teacher. 2019; 81298–109 doi: https://doi.org/10.1525/abt.2019.81.2.98
Published: 01 February 2019
.... On chromosome 3 resides gene E Gene E alleles: pink/purple (Pink is dominant to purple) Genotype: Your organism is homozygous for the recessive allele As a group, count the number of chromosomes present in the hypothetical cell. Form alignment along the metaphase plate. How are the...
Includes: Supplementary data
Images
Published: 01 February 2016
( Abraham et al., 2014 ). They are true-false questions asking whether a dominant allele will necessarily increase in frequency, whether a recessive allele will decrease in frequency, and whether a recessive allele will necessarily go extinct. The EvoDevoCI questions assess the misconception that natural
Journal Articles
The American Biology Teacher. 2019; 8113–10 doi: https://doi.org/10.1525/abt.2019.81.1.3
Published: 01 January 2019
... other words, he believed that each trait was controlled by one or two genes, and that each gene had two alleles, one dominant and the other recessive. He proposed, for example, that skin color was determined by two genes working together ( Davenport, 1913 ). After analyzing data collected by...
Journal Articles
The American Biology Teacher. 2017; 798635–643 doi: https://doi.org/10.1525/abt.2017.79.8.635
Published: 01 October 2017
... Aa individual? Yes . How do aA individuals arise? It happens when the first parent passes on a recessive allele because the alleles are not sorted to always have heterozygous individuals labeled as “Aa.” 6 Allelic Proportions: Calculates the population's allelic frequencies. Note...
Journal Articles
The American Biology Teacher. 2018; 804291–300 doi: https://doi.org/10.1525/abt.2018.80.4.291
Published: 01 April 2018
...Figure 3 Punnett square demonstrating the possible outcomes of a genetic cross in which each parent possesses one each of the dominant (A) and recessive (a) gene variants (alleles). Figure 3. Punnett square demonstrating the possible outcomes of a genetic cross in which each parent possesses...
Journal Articles
The American Biology Teacher. 2017; 794309–312 doi: https://doi.org/10.1525/abt.2017.79.4.309
Published: 01 April 2017
... multiply the segments to obtain the area of the rectangles for each genotype ( Figure 3 ). Genotypes with two dominant alleles (homozygous dominant) or one dominant and one recessive allele (heterozygous) will all be yellow. Thus, we can sum the areas of the rectangles representing pp and pq : 0.16...
Journal Articles
The American Biology Teacher. 2017; 794335–338 doi: https://doi.org/10.1525/abt.2017.79.4.335
Published: 01 April 2017
... genetic. It seemed due to a recessive allele, which recombined when cousins married. Bateson commented: In Garrod's case, the evidence had not spoken for itself to everyone. Understanding its meaning required appreciating other concepts. Context mattered. Dramatically, alkaptonuria was the first...
Journal Articles
The American Biology Teacher. 2017; 794288–293 doi: https://doi.org/10.1525/abt.2017.79.4.288
Published: 01 April 2017
..., even if the recessives are very damaging. Define evolution in terms of changing allele frequencies in a population. Explain what the Hardy-Weinberg equilibrium principle is, and apply it to individual populations. Identify the six conditions required for HWeq to exist, and explain why each is...
Journal Articles
The American Biology Teacher. 2016; 786512–514 doi: https://doi.org/10.1525/abt.2016.78.6.512
Published: 01 August 2016
... negative , in which a nonfunctional allele that usually would act recessively exerts a dominant effect, which leads to no gene function.) In Shenandoah Skunks, the S allele leads to stinkiness, and the s allele is nonfunctional. You cross Ss males to Ss females. Of the offspring, you don't find any that...
Journal Articles
The American Biology Teacher. 2016; 782101–108 doi: https://doi.org/10.1525/abt.2016.78.2.101
Published: 01 February 2016
... ( Abraham et al., 2014 ). They are true-false questions asking whether a dominant allele will necessarily increase in frequency, whether a recessive allele will decrease in frequency, and whether a recessive allele will necessarily go extinct. The EvoDevoCI questions assess the misconception that natural...