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Mobile pieces of DNA - transposable elements - that insert themselves into chromosomes and accumulate during evolution make up more than 40% of the human genome. Element of four types - long interspersed elements (LINEs), short interspersed elements (SINEs), LTR transposons and DNA transposons - are inserted more or less randomly throughout the human genome. These elements are conspicuously rare at the four homeobox gene clusters, HoxA, HoxB, HoxC, and HoxD, as illustrated for HoxD in Each Hox cluster is about 100 kb in length and contains 9 to 11 genes, whose differential expression along the anteroposterior axis of the embryo establishes the basic body plan for humans (and for other animals). Why do you suppose that transposable elements are so rare in the Hox clusters?
Which of the following is a CORRECT statement about the membrane transport of a xenobiotic?
The 1st gene is responsible for determining blood group A,B or O. For this gene both A and B are dominant and O is recessive.
Give two mechanisms that allow the nerve cell to recover from the effects of an action potentials and neurotransmitter release.Say how the mechanisms cause the cell to recover.
Describe the different steps of a growth curve for microbes, and what factors influence each step. Explain in 100+ words.
Why do you think you only plate a small amount of bacterial solution on the LB-Amp plate?
explain how an action potential, originating at the axon hillock, is propagated along myelinated and nonmyelinated axons.How are graded potentials made
Conditional lethal mutations are very useful in genetic and biochemical analyses of complex processes such as DNA replication. Temperature sensitive mutations, which are one form of conditional lethal mutation.
Determine which types of cells can we derive continuous cell lines? From which types of cells can we? Derive finite cell lines? From which types of cells do we derive mature differentiated cells?
The loss of water during a hot day causes the blood volume to reduce and the osmolality of bodily fluids to increase. Discuss and explain how antidiuretic hormone can help to maintain homeostasis.
The transformation was successful, however, when my plate with ten uL did not show any colony growth, whereas, my 200 uL plate showed colony growth.
in a cross between true breeding tall plants and with true breeding short plants all of the F1 are tall.when these plants are allowed to fertilized themselves,the F2 plants are occure in a ratio of 3tall to1short. which of the following is not val..
Define stable equilibrium in population genetics. Describe the kind of data that you would need to collect about a population to conclude that it is in a stable equilibrium.
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