The mighty chestnut tree once dominated many of our Appalachian forests but was decimated by an exotic fungus in the first part of the 20th century. A few small groves of trees still remain in isolated pockets, and living roots of some of the fallen ancient trees still try to send up new shoots. These shoots always die as soon as they are exposed to the fungus. How could chestnut trees be genetically modified to be resistant to the fungus and to grow again?
What will be an ideal response?
A gene from a resistant plant, or an engineered gene that provides the resistance, could be inserted into the seeds of chestnut trees or into new shoots.
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An illegal practice is found among some athletes who try to increase the normal number of RBCs in an attempt to boost oxygen delivery. This practice is called ________
A) blood doping B) leukemia C) bloodletting D) bone marrow transplant
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a. the chromosomal location of disease-related allele b. sex linkage c. the DNA sequence of disease-related allele d. the source of the original mutation in the disease-related allele
What is the Hardy-Weinberg equation?
a) an assessment of evolution at a particular locus b) a determination of allele frequency c) a determination of genotype frequency d) an assessment of heterozygosity in a population