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1. A couple who are both carriers of the gene for cystic fibrosis (CF) have two children who have cystic fibrosis. What is the probability that their next child will have cystic fibrosis? What is the probability that their next child will be a carrier of cystic fibrosis?
2. Black coat color (B) in rats is dominant to brown coat color (b). There is a cross between a homozygous recessive and a heterozygote. What is the chance of getting an offspring with the homozygous recessive phenotype?
3. Red flowers (R) in snapdragons are dominant over the recessive white flowers (r). Heterozygotes have pink flowers, whereas the two homozygotes have red flowers or white flowers. Plants with red flowers are crossed with plants with white flowers. What proportions of the offspring will have pink flowers?
4. Huntington's is an autosomal dominant disease. Work a cross between a homozygous recessive mother (hh) and a heterozygous father (Hh). The offspring would have very different outcomes from an autosomal recessive disorder. What are the possible genotypes and phenotypes of children born from this union?
5. Mendel wanted to cross true breeding tall plants (TT) with true breeding short plants (tt). Would it be possible to produce offspring that were true breeding for either of these characteristics if these two plants produced offspring?
explain What is the original parental cross. Garden pea producing round seeds were crossed with those producing wrinkled seeds. The result was the production of 5474 round seeds and 1850 wrinkled seeds.
The recipe for 10x TBE buffer is 890 mM Tris, 890 mM boric acid, 20 mM EDTA. What is the concentration of 1x TBE buffer?
Individuals with cystic fibrois produce very salty sweat and have thick mucus in the linings of their lungs and air passages. Explain how an abnormal CFTR protein accounts for these symptoms.
The purpose of this exercise is to demonstrate the comparative effect of UV on three bacterial populations. This could have been accomplished without a cardboard or plastic cover. Why was the cover used.
Animals can be classified according to their mode of thermoregulation. Sort the animals below, indicating their likely thermoregulatory strategy. Note that poikilotherms are sometimes referred to as heterotherms.
Name the three modes of energy (heat) transfer and briefly discuss them. Include at least one example of each to illustrate your discussion.
Calculate the pI for the tripeptide E-R-H and draw its predominant chemical structure at its pI, including the predominant + and - charges present.
the clicheacute an ounce of prevention is worth a pound of cure means that preventing a disease is less costly
Explain how the decline in genetic diversity with distance from Africa supports the Out of Africa hypotheses.
The citric acid cycle evolved from preexisting metabolic pathways. Evidence includes organisms that do not use the citric acid cycle, but have genes coding for enzymes used in the citric acid cycle
Using abiotic and biotic examples, give real examples of how studying ecology can explain extinction of a species. Use at least two different organisms in your examples of species that are extinct.
Zebrafish are increased in fish tanks with one family each tank. The mutation spadetail is a recessive lethal. A stock tank for spadetail was made by crossing two carriers.
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