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In whippets, wild-type dogs are skinny. A mutation in the myostatin gene causes dogs to become more muscular. Dogs containing one copy of the mutant myostatin gene are medium-muscled; dogs in which both copies of the myostatin gene are mutant are highly-muscled. A dog breeder mates a wild-type skinny dog with a highly-muscled dog. He then self-crosses the resulting F1 progeny. What are the phenotypic ratios in the F2 progeny?
Define partial pressure of a gas and identify 3 different units used to measure partial pressure. What is the PO2 of the atmosphere at sea level? Express in units of torr.
At 1.4 mg/ml pure tubulin, the plus (+) ends of microtubules grow at a rate of about 2 µm/min. At this growth rate how many?-tubulin dimers (8 nm in length) are added to the ends of a microtubule each second?
A mainland population of 10,000 ground beetles have the neutral alleles A1 and A2 with frequencies of A1 = 0.4 and A2 = 0.6. 16 male and 20 female beetles found a new population on Russell Island.
There were many extinction events since life began. Permian extinction is a very important event. Explain why was it so important?
Why is his discovery important for modern-day molecular biology?
Assume that, during biological research, it became possible to incorporate fully functional chloroplasts into the basal layer of our epidermal skin cells. Knowing the structure and function of chloroplasts, how will this influence our body.
Design a kidney that can produce hypoosmotic urine, which is less concentrated than blood plasma. Assume that the anatomical structure of the kidney is the same as that in humans. Feel free to alter anything else you choose.
A nutrition student observes that people who skip breakfast tend to be overweight more often than people who eat breakfast every day. He hypothesizes that people who skip breakfast get hungry later in the day and overeat, actually consuming more t..
In maize, a dominant allele A is necessary for seed color, as opposed to colorless (a). Another gene has a recessive allele wx that results in waxy starch, as opposed to normal starch (Wx). The two genes segregate independently. An Aa WxWx plant i..
"The genetic material ultimately unravels, deteriorates, and the cell dies. This causes cells to die over time, or "age" so they cannot infinitely keep duplicating." What types damages or diseases do we experience as a result of the unraveling and..
Can you describe what happens during bacterial DNA replication (what are the stages, what happens during each one, what are the major types of proteins involved)?
What do the lines between O and H represent? Is it a hydrogen bond? Or just a regular covalent bond?
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