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1. Hemoptopoietic stem cell can give rise toa) eythorocytesb) erythocytes and lymphocytesc) all blood cells and macrophagesd) all blood cells,macrophages,and skin cellse) all blood cells,macrophages,skin cells
2. When stem cells of the intestinal epithelium and epidermisdivide, they give rise to two different cells: one stem cell andone _________ cella) gobletb) cryptc) g0d) transit-amplifyinge) eteroendocrine
3. Mammalian embyonic stem cells are cultured from cells taken froma) the 4-cell embyob) the inner cell massc) trophoblast cellsd) amnion cellse) chorion cells
4. tumor initiation occurs in aa) single protein moleculeb) single cellc) few cellsd) single tissuee) single organ
5.Nonhereditary retinoblastoma develops only whena) a somatic mutation inactivates the Rb geneb) a somatic mutation activates the Rb genec) two somatic mutations inactivate two serparate Rbgenesd) one germ-line mutation and one somatic mutation inactivateRb genese) two germ-line mutations inactivate two sep Rb genes
Five loci control a polygenic characteristic. There are two alleles at each locus, one additive and one non-additive. Assuming the non-additive alleles do not contribute to the characteristic, and each additive allele contributes equally, how many..
People who live at high altitudes often have a high red blood cell count, a condition called polycythaemia. Explain the cause of the polycythaemia and its possible benefit. Do you think it could have adverse effects? Explain!
What is the inbreeding coefficient for the offspring of a) a full sib mating, b) an uncle/niece mating, c)1st cousing mating? Explain why such close inbreeding in a generally outbred population may lead to decreased fitness.
If 9% of an african population is born with a severe form of sickle cell anemia (ss), What percentage of the population will be more resistant to malaria because they are heterozygous (Ss) for the sickle-cell gene?
why does Beer's law hold more accurately for the relationship between absorbance and concentration than that between % transmittance and concentration?
Understand why the same cells (granulosa and theca) of the follicle produce estradiol during the follicular phase, but progesterone during the luteal phase? Why? (hint: look at steroid synthesis pathway)
On chromosome three of corn there is a dominant gene (A1), which together with the dominant gene (A2) on chromosome 9, produces colored aleurone.
A patient is brought into the ER in a coma. Upon inspection, the physician sees evidence of many new tattoos, as well as yellowing of the skin and eyes. What is the most likely cause of the patient's condition?
Specify whether the taste of fresh water surprised you or not? Explain if your perception of coarseness change or not?
Yellow tomatoes with a pear shape bring high price per basket to growers. Pear shape, yellow color, and terminal flower position are recessive traits produced through alleles, f, r, and t, respectively.
Assume i f you are performing in-situ hybridization to detect mRNA, why do you use the antisense strand? Are you using RNA or DNA as a probe for mRNA?
Which organism can cause food-borne intoxication.
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