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Both loci for a gene from a parent who has a mutant phenotype and his normal child indicate they are both heterozygous with the same alleles. Why does the child not display the mutant phenotype?
In aquatic gas exchange across gills, how does countercurrent exchange improve the uptake of O2 that otherwise would be lost with concurrent exchange?
List the types of ecological interactions that different species microbes can participate in, whether the interaction is positive, negative or neutral for each party, and describe a microbial example of this type of interaction in detail.
What affect might you expect the precipitation of hemoglobin S and the subsequent cell sickling to have on oxygen delivery in an individual with sickle cell disease?
Albinism in humans is inherited as a simple recessive trait. For the following families, estimate the gentypes of the parents and offspring.
A forensic medical doctor, found a human vertebra in west beach, Adelaide and wishes to know if it is from the lumbar or thoracic segment of the spine.
Shigella flexneri is an intracellular pathogen closely related to E. coli and S. typhimurium. Some experiments have shown that oxygen controls expression of some virulence factors in this organism.
Hemoglobin is composed of four polypeptide chains whereas myoglobin, which is structurally related to the subunits comprising hemoglobin and about the same size as one such subunit.
explain the difference between the lung size of bird,frog and rat according to adaptation of environment and tell which animal has the biggest one?
A farmer planted a field of BT 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 35 ears in 1/1000 of an acre. He determines that each ear has about 500 kernels on average. He also knows that a bushel contains about 97,..
Consider these three questions concerning this animal cell that has been treated with the inhibitor.
Describe how you would identify E. coli mutants that cannot utilize galactose as a carbon (energy) source. You are given a test tube containing E. coli grown under full nutrition, a spreader, filter paper, Petri plates with agar gel containing var..
In agricultural areas, farmers pay close attention to the weather forecast. Right before a predicted overnight freeze, farmers spray water on crops to protect the plants. Use the properties of water to explain how this method works. Be sure to men..
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