One thousand independent populations of Drosophila are established with 25 individuals in each population, of which, one individual is of Aa genotype and the other nine are of AA genotype. If random genetic drift is the only mechanism acting on these populations, then, after a large number of generations, the expected number of populations fixed for the "a" allele is

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#Question id: 31015

#Unit 4. Cell Communication and Cell Signaling

A ligand binds two different receptors with a Kd value of 10⁻⁷ M for receptor 1 and a Kd value of 10⁻⁹ M for receptor 2. For which receptor does the ligand show the greater affinity?

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#Question id: 31261

#Unit 4. Cell Communication and Cell Signaling

Most tumors induce the formation of new blood vessels that invade the tumor and nourish it, a process called as: 

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#Question id: 2993

#Unit 2. Cellular Organization

During meiosis, a defect occurs in a cell that results in the failure of spindle microtubules binding at the kinetochores. Which of the following statements describes the most likely result of such a defect?

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#Question id: 29456

#Unit 6. System Physiology – Plant

In maize kernels, IAA also appears to be synthesized by a tryptophan independent pathway via

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#Question id: 20309

#Unit 7. System Physiology – Animal

The precursor of all adrenal medullary hormones secretion: