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x-chromosome-genes-and-dominance

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Journal Articles
The American Biology Teacher. 2014; 769576–581 doi: https://doi.org/10.1525/abt.2014.76.9.2
Published: 01 November 2014
..., dominance can change depending on what aspect of the phenotype is being studied and on the environmental conditions. X-linked genes are a special case, whether enzymatic or not. Because of X-chromosome inactivation, only one X-linked allele can be active in a cell, which means that the concept of dominance...
Journal Articles
The American Biology Teacher. 2019; 81298–109 doi: https://doi.org/10.1525/abt.2019.81.2.98
Published: 01 February 2019
... information below: On chromosome 1 reside genes A and B : Gene A alleles: black/white (black is dominant to white) Gene B alleles: dark blue/light blue (dark blue is dominant to light blue) Genotype: Your organism is heterozygous for gene A and heterozygous for gene B. Assume the maternal copy of...
Includes: Supplementary data
Journal Articles
The American Biology Teacher. 2018; 804256–262 doi: https://doi.org/10.1525/abt.2018.80.4.256
Published: 01 April 2018
... with Maurice Wilkins in 1962. They also draw attention to how the discovery of the structure of DNA paved the way for modern genetics. While Watson and Crick are highly appraised for their work, the role of Rosalind Franklin, who produced the X-ray diffraction image of DNA (Photo 51) that made Watson...
Journal Articles
The American Biology Teacher. 2017; 799720–727 doi: https://doi.org/10.1525/abt.2017.79.9.720
Published: 01 November 2017
... ; regression analysis: p < 0.00001). Additionally, students who passed the BPT with a score greater than 50 percent were much more likely to earn an A or a B in BI 211, and much less likely to fail or drop the course ( Figure 1B ; X 2 0.05,5 = 20.7, p < 0.001). Although we accepted scores of 51...
Journal Articles
The American Biology Teacher. 2017; 794288–293 doi: https://doi.org/10.1525/abt.2017.79.4.288
Published: 01 April 2017
..., http://www.cbsnews.com/news/gene-therapy-engineer-t-cells-block-hiv/ Chromosome 3 map (human and chimpanzee), http://www.evolutionpages.com/chromosome_2.htm (For other options—kuru, PKU, and AMD—see Supplement 1: Teachers Guide.) Ask: Would the effects of natural selection be...
Journal Articles
The American Biology Teacher. 2016; 784351–354 doi: https://doi.org/10.1525/abt.2016.78.4.351
Published: 01 April 2016
... location of the genes for horned/hornless and fertile/sterile revealed that these genes are very close to one another on chromosome 1. Breeders know that all goats with horns are fertile. Hornless female goats may or may not be fertile. If they are fertile and mate with a horned male, all the offspring...
Journal Articles
The American Biology Teacher. 2015; 778583–586 doi: https://doi.org/10.1525/abt.2015.77.8.4
Published: 01 October 2015
... monosaccharide in an oligosaccharide is added to the oligosaccharide by a specific enzyme. These enzymes are coded for by genes, which are inherited and, of course, subject to mutation and variation. In the case of ABO blood types, there is a locus near the tip of the long arm of chromosome 9 that contains a...
Journal Articles
The American Biology Teacher. 2014; 763184–188 doi: https://doi.org/10.1525/abt.2014.76.3.6
Published: 01 March 2014
... cell has T3-2, T7-4 The homologous duplicated chromosomes are pulled apart 16 The gametes have unpaired chromosomes 2, T1-2 The gametes have half the number of chromosomes as the original cell has 13 Half of the sperm cells contain an X chromosome and half contain a Y chromosome...
Journal Articles
The American Biology Teacher. 2013; 752102–105 doi: https://doi.org/10.1525/abt.2013.75.2.6
Published: 01 February 2013
...) chromosomes and genes. Female somatic cells have two X chromosomes; male somatic cells have an X and a Y chromosome. Female gametes have one X chromosome; roughly half of male gametes contain an X and half contain a Y. Otherwise, the size of the gamete has nothing to do with the amount of nuclear genetic...
Journal Articles
The American Biology Teacher. 2012; 749667–671 doi: https://doi.org/10.1525/abt.2012.74.9.14
Published: 01 November 2012
..........................4:288-M The Making of the Fittest.......................5:356-M EVO: Ten Questions Everyone Should Ask about Evolution.......................5:356-M Biomimicry – Innovation Inspired by Nature.......................6:430-M Bones, Stones, and Genes: The Origin of Modern Humans...
Journal Articles
The American Biology Teacher. 2012; 742111–113 doi: https://doi.org/10.1525/abt.2012.74.2.9
Published: 01 February 2012
... 144: "What can be more singular than the relation between blue eyes and deafness in cats, and the tortoise shell color with the female sex..." Phenotypic traits can be linked due to proximity on same chromosome ( Morgan, 1911 ); and X inactivation and mosaic phenotypic effects for X-linked genes...
Journal Articles
The American Biology Teacher. 2012; 74115–19 doi: https://doi.org/10.1525/abt.2012.74.1.5
Published: 01 January 2012
... compensation, and the fact that females are really mosaics for genes on the X chromosome can be discussed, using calico cats' coat coloration and Duchenne's muscular dystrophy as models. I introduce Huntington's disease or chorea with a video clip of Woody Guthrie singing the folk song "This Land Is Your...
Journal Articles
The American Biology Teacher. 2012; 74274–80 doi: https://doi.org/10.1525/abt.2012.74.2.3
Published: 01 February 2012
... this is human chromosome number 2. Human cells have 23 pairs of chromosomes in the nucleus (numbered 1–22 and including the sex chromosomes, X and/or Y). Chimps have 24 pairs of chromosomes. Based on the chromosomal banding patterns and from the fact that other nonhuman primates share the chimp...
Journal Articles
The American Biology Teacher. 2012; 744224–230 doi: https://doi.org/10.1525/abt.2012.74.4.4
Published: 01 April 2012
...%. For class 2, the pretest average was 57% and the posttest average was 92%. Figure 1. Molecular diagnostics. Overview of the MGDP diagnostic laboratory exercise. (A) Map of the mitochondrial genome, indicating the location of the L1 (tRNA Leu ) gene and approximate site of faux PCR...
Journal Articles
The American Biology Teacher. 2011; 7318–14 doi: https://doi.org/10.1525/abt.2011.73.1.3
Published: 01 January 2011
... led to large scale production for medical use. Other chapters concern anatomy, blood circulation, bacteria, vaccination, anesthesia, X rays, tissue culture, cholesterol, and DNA. Hist Sci 37: 113 New Sci 5//1//99, p. 54 Animal Physiology To Know a Fly by Vincent G. Dethier Holden-Day...
Journal Articles
The American Biology Teacher. 2010; 725296–300 doi: https://doi.org/10.1525/abt.2010.72.5.7
Published: 01 May 2010
... years. We give an overview of the modules and describe how to obtain them. Table 1. Glossary of some of the mathematical terms used in modules. Term Definition Algebraic equation Equations involving variables such as x, y, and t. Algorithm A well-defined sequence of steps for...
Journal Articles
The American Biology Teacher. 2009; 714235–244 doi: https://doi.org/10.2307/27669417
Published: 01 April 2009
... (50 x 9 mm diameter). Petri dishes are about half-filled with hot medium, which is allowed to cool and solidify. The medium can be refrigerated to promote solidification. Hints & Precautions Do not boil the medium during preparation. Medium should be taken from the refrigerator and warmed to room...
Journal Articles
The American Biology Teacher. 2008; 709554–556 doi: https://doi.org/10.2307/27669342
Published: 01 November 2008
... a Dihybrid Cross sjo 0 D JL*mrosophila melanogaster is a commonly utilized organism for testing hypotheses about inheritance of traits. There is a wide variety of mutants of Drosophila that demon strate effectively both dominant and recessive traits, as well as autosomal and X-linked inheritance...
Journal Articles
The American Biology Teacher. 2008; 708472–477 doi: https://doi.org/10.2307/30163328
Published: 01 October 2008
... and made its way into newer textbooks (Figure 2). The six-king- dom system described in the 2006 Massachusetts learning standard represents a merger between the five kingdoms and the three domains; this six-kingdom scheme dominates the most recent crop of high school biology texts. In my district, for...
Journal Articles
The American Biology Teacher. 2008; 705284–287 doi: https://doi.org/10.2307/30163274
Published: 01 May 2008
.../Early childhood Hemophilia X-linked Inability to produce clotting factor Infancy/Early childhood Huntington's disease Autosomal dominant Central nervous system disorder Adulthood Marfan s ndrome y Autosomal dominant Disease of connective tissue.Those afflicted may grow tall and thin and go on to develop...