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A cross is made between a leucine-requiring haploid yeast strain of genotype leu and a wild-type strain that can make its own leucine (leu+).
a. What will be the genotype of the transient meiocyte?b. What progeny genotypes will be produced and what will be their proportions
Name the non-memory B & T cells produced by the body. Discuss the interactions and origins of the different types of T cells and B cells and the role of "recognition." Describe the interplay of these cells in a specific immune response.
Two homozygous, white-seeded corn lines were crossed and all progeny were red-seeded. These red-seeded F1 progeny were selved, and the population segregated 9 red-seeded:7 white-seeded. Explain these results by determining the number of genes cont..
Mitochondria are the only organelles that contain their own DNA (circular) and have a double membrane. Why do you think this might be so?
Hypothesis: since the normal substrate for the enzymes is lactose, adding lactose along with ONPG will reduce the rate of yellow color formation.
Atherosclerosis is the progressive disease of blood vessels that is responsible for millions of death each year. Explain disease process, noting the involvement of specific cell/tissue types and molecules.
What is the role of phosphatidic acid in the synthesis of glycerol containing phospholipids? Is it limited to this role or does it also play a role in the synthesis of triacylglycerols?
Cells have several mechanisms to prevent the production and accumulation of truncated protein fragments. To illustrate why these fragments can be deleterious, consider a transcriptional activator protein called Groovy that binds to an enhancer ele..
In a large interbreeding population 81% of the individuals are homozygous for a recessive character. In the absence of mutation or selection, what percentage of the next generation would be homozygous recessive? Homozygous dominant? Heterozygote?
You have a 10x enzyme buffer that you are to use in a particular reaction. The total volume of the reaction is 30 micro liters. Determine how much of the 10x buffer should you add so that the final concentration of buffer in the reaction is 1x?
Why did the successful cloning of Dolly the sheep support the idea that the differentiation of different cell types observed in development is orchestrated by gene regulation.
At the official announcement of completion of the draft human genome (choose all that apply).
what would be the partial diploid genotype for a strain that would produce B-galactosidase constitutively and permease inducibly?
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