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Male cockroaches with mutations that strongly decrease the function of an RTK (receptor tyrosine kinase) called RTKX are oblivious to the charms of their female comrades. This particular RTK binds to a small molecule secreted by sexually mature females. Most males carrying loss-of-function mutations in the gene for Ras protein are unable to respond to females. You have just read a paper in which the authors describe how they have screened cockroaches that are mutant in RTKX for additional mutations that partly restore the ability of males to respond to females. Propose two possible additional mutations in two separate genes from the receptor that could allow cockroaches with a mutant RTKX to now respond to females. You may consider mutations that could either increase or decrease the activity of the protein. Explain your answer.
Coherence is defined as a state where body systems (most importantly the heart and brain) are in-sync. Clarity of thought and emotional balance are the result.
Advantages and disadvantages of mesoderm, the need of modifications for the elimination of nitrogenous waste, and a description of protonephridial function.
A mutation in a DNA repair pathway makes the mutant strain highly susceptible to Nitrous acid (see above for hint) and to the depurinating agent Aflatoxin.
as calcium and magnesium salts of fatty acids are insoluble in water, how would you expect this to affect the usefulness of soap in hard water.Why would these results happen the way they did.
During translation, the mechanism of accommodation is used to select against incorrect aminoacyl-tRNAs.
Develop a labeled diagram of a small section of the plasma membrane and briefly describe its structure and function.
An enzyme is discovered that selectively shortens telomeres. Its gene is isolated, cloned and transfected into a malignant cell line where it is transcribed and translated.
If a trait had a broad-sense heritability of 1, what would it mean? 0.5? 0? What type of traits has a broad-sense heritability of 1? What type of traits has a heritability of zero?
What promotes exponential growth? What constrains population development.
A boy, whose parents and grandparents had normal vision is color blind. What are the genotypes of his mother and his maternal grandparents? (B = normal vision; bb = color blind)
Is one type of music better at enhancing student performance.
How various of each possible phenotype. A locus in Australian Bearded Dragons is involved in the production of pigment. When heterozygous parents mate, 75% of the progeny are colored and the rest are albino.
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