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Imagine you do a test cross between a purple-flowered pea plant having serrated leaves (a dominant trait) and a white-flowered pea plant having smooth edges. If the purple-flowered plant is heterozygous for both traits, the expected ratio in the offspring is 1 purple-serrated: 1 purple-smooth:1 white-serrated:1 white-smooth. Instead, you see 4 purple-serrated:1 purple-smooth:1 white-serrated:4 white-smooth. What is the explanation of this ratio?
Years ago, a newspaper headline read "Scientists Create Life." Scientists had strung together a chain of nucleotides to make a strand of DNA. This was the first time DNA had been synthesized in a laboratory; it has been synthesized many times since t..
Why are trees typically not found in a tundra biome?
You have determined the DNA- binding site of a protein by determining the DNA footprinting after labeling one strand. To check your results, you repeat the experiment after labeling the other strand of the duplex.
In the signal transduction lecture, we established that the BCR-ABL translocation creates a membrane bound receptor with constitutive kinase activity. What defect is associated with this oncogenic mutation?
The autosomal dominant allele M L specifies a tailless phenotype in cats. This allele is lethal in the homozygous state. A tailless female cat is mated to a tailless male cat.
You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?
One of the most common complants of pregnant women is the need to urinate often. Explain this, considering the arrangement of the pelvic organ.
A particular human disease is caused by a recessive allele. If one out of every 2500 babies is born with the disease, what is the frequency of the allele? Assume the population is in equilibrium.
q1. what accounts for a genetic similarity between daughter cells and the parent cell following mitosis and b genetic
Define neurotransmitters and describe their role in neurotransmission. Discuss how they are released, how they affect receiving neurons, and how they are removed from receptor sites.
The results of the cross were 129 red-eyed females, 132 red-eyed males, 88 white-eyed females, and 86 white-eyed males. Test these data by chi-square analysis, and determine if the results are consistent with Morgan's hypothesis that Drosophila ey..
In this assignment, you will select a fermented food or beverage from the list provided. After making your selection, you will prepare a 3 page written report about it. The report should include historical information regarding its human developme..
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