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Of course, the development of an adult organism from a zygote isn't quite that simple. In addition, things can go awry with cell division - notably the transformation of normal cells into cancer cells that divide in an uncontrolled way. If a single cancer cell in a tissue of the human body divides once every day, how long will it take for that cell to produce a tumor 21 cm3 in volume? Assume that the original cell has a volume of 10-9 cm3, and determine the integral number of divisions that gives the closest result.
How many different 6-mer sequences of DNA are there? (Hint: There are 16 possible dinucleotides and 64 possible trinucleotides). We can quantify the information-carrying capacity of nucleic acids in the following way.
Prepare an essay on nosocomial infection.
Albinism in humans is inherited as a simple recessive trait. For the following families, estimate the gentypes of the parents and offspring.
While working in a cell biology laboratory, you are instructed to create a solution that is iso-osmostice to the cells that the lab uses.
Which of the following characteristics are true of spermatogenesis?
A dominant allele, A, causes yellow color in rats. The dominant allele of another independent gene, R, produces black coat color.
Assume that the couple had a daughter with a normal color vision and a widow's peak. What is the chance that she is homozygous for both genes?
Explain the results. Show the genotypes of the parents, and construct a linkage map showing the correct order and distance of the loci.
A student performed a BioRad miniprep of plasmid DNA that resulted in 100ul(microliter) of DNA solution. To determine the concentration of this solution, 20ul of the DNA solution was placed in 480ul of water and the absorbance of the diluted sampl..
In a certain plant, fruit is either red or yellow, and fruit shape is either oval or long. Red and oval are the dominant traits. Two plants, both heterozygous for these traits.
theoretical genetic strains of a virus are used to simultaneously infect a culture of host bacteria. Of 10,000 plaques scored, the genotypes in the following table were observed.
How several bacteria were on the soap? How did they get there. Unlike squamous cells, cuboidal and columnar cells have large, open cytoplasms. Which functions of epithelial tissue are supported by having such big cells.
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