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1. In rats, a black-tailed mutant was discovered. When it was crossed to a pink long-tailed rat, 4 offspring were black-tailed and 3 were pink tailed. Two of these black-tailed rats were crossed and they produce 6 black tailed and 3 pink-tailed rats. These experiments were repeated several times with approximately the same results. Never was a case seen where a mating between two black-tailed rats produced all black-tailed rats. Explain the black X pink tail and black X black crosses in terms of the alleles of the gene involved in tail length and the genotypes of the rats in the crosses and their offspring.
how to Define the terms anabolic steroid. Discuss the potential risks and dangers associated with using steroids and human growth hormone.
which direction of research appears to be having the most success.
It is determined that the human immune system synthesizes 10 8 – 10 10 antibodies. The portion of a typical active in binding antigen consists of two variable domains each containing one hundred amino acids.
Experiments with erythrocyte "ghosts" were carried out to learn more about the glucose transporter in red blood cells. "Ghosts" are prepared by lysing red blood cells in a hypotonic medium and washing away the cytoplasmic contents.
Uric acid dissociates with a pKa of 5.80 and can be treated as a simple monoprotic acid in pH range. Its solubility in urine depends on relative amount of protonated and unprotonated forms.
A cell attempts mitosis with only one spindle pole, but is otherwise normal. Which of the following is true for this cell?
Imagine a population of 12,000 people: 7,000 females and 5,000 males. Syndrome A is an Xlinked recessive disorder. The population contains 134 affected females, 1682 carrier females and 710 affected males.
They isolated bacterium in a pure culture and demonstrated that experimental healthy animals injected with this culture became sick. What other test do researchers require to perform to be absolutely sure that the bacterium is responsible for the dis..
A relative of a friend of yours had a spinal cord injury after a bad car accident. The medical team has decided that this patient is a good candidate for a clinical trial using stem cell therapy.
Determine the phases of an action potiental and what channels open/close, what causes them to open/close, what ion moves, and in which direction do the ions go?
If there was mutation in a dna triplet that changed the first triplet from ctt to ctc, would that cause the problem with the resulting polypeptide.
Consider the HIV enzyme called protease. The amino acid residues at the active site are highly hydrophobic. In designing a drug that would bind to the active site and jam it, researchers should use which sort of molecule.
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