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Define frequency-dependent selection (1). Can it result in the stable coexistence of two or more alleles at the same locus over several generations (2)? If you answered yes, give an example and explain how the equilibrium is maintained; if you answered no, explain why that is (2).
Albinism is a rare genetically inherited trait that is only in phenotype of homozygous recessive individuals. The most characteristic symptom is a marked deficiency in the skin and hair pigment melanin.
Hiking in the deserts of New Mexico you encounter a strangely shaped, entirely smooth metallic rock. Oozing from the rock is a slime mold that you believe to be a new species never before seen (on earth). The mold fluoresces bright pink normally b..
Darwin understood how natural selection works in the presence of a population with many variant types. What does that variation consist of? How does variation arise? How does it spread during the population.
In mice, the A y allele of agouti mice is ecessive lethal allele, but it is dominant for yellow coat color. What phenotypes and ratios of offspring would you expect from the cross of a mouse
What structure surrounds the cell membrane (in plants) and gives the cell support.
the best way to describe how oxidation energy is converted to ATP energy during glycolysis is by a. feedback inhibition b. allosteric conformation c. allosteric activation d. substrate-level phosphorlation.
Some proponents argue that the "damage" hypothesis makes more sense from an evolutionary perspective, claiming that it is more advantageous for an organism's defence system to respond to tissue damage than to the mere presence of a foreign microbe. D..
A lacI+ lacO+ lacZ+ lacY+ Hfr strain is mated with an F- lacI- lacO+ lacZ- lacY- strain. In the absence of any inducer in the medium, beta-galactosidase is made for a short time after the lac region has been transferred. Explain why it is made and..
A miRNA regulates its target mRNA through degradation. Let us suppose miRNA-199 targets Blimp1. Which progenitor population in the developing embryo will be affected?
What are the different types of sugars? What is the difference between inorganic and organic compounds?
Body Eyes Tan normal 241 Tan sepia 259 Ebony normal 240 Ebony sepia 260 b) Are the loci linked? If so, how many map units are they apart ? Do a ?2 test and show your work below. Diagram this cross. please show crosses.
Describe how vestigial structures provide clues about a species' evolutionary past. Illustrate the argument with vestigial structures found in humans or other real species.
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