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A geneticist is studying three loci, each with one dominant and one recessive allele, in a small population of rare plants. She estimates the frequencies of the alleles at each of these loci as A = 0.55 , a = 0.45; B = 0.25, b = 0.75; C = 0.80, c = 0.2. What is the probability that all the recessive alleles (a, b, c) will be lost from the population through genetic drift?
I in brief describe how a mutation might alter gene function (at the molecular level) if it fell into the following categories. As an example, a neomorphic mutation could result from expressing a gene in a novel location.
What have to be true of the cell wall of this bacterium? Mammalian blood contains an equivalent of 0.15 M. Seawater contains the equal of 0.45 M. What will occur if red blood cells are transferred to seawater.
Explain the process of skeletal muscle contraction, starting from the efferent motor neuron's action potential, and ending with the relaxation of the muscle.
Many flowering plants have co-evolved with their pollinators, while others have not. Give one advantage and one disadvantage for flowering plants that have generalists pollinators and flowering plants that have specialist pollinators.
Phosphorous is needed to synthesize the deoxyribonucleoside thriphosphates used in DNA replication. A geneticist grows some E. coli in a medium containing nonradioactive phosphorous for many generations.
Explain why is RNAse added to PCR? Prevent RNA from annealing to the template strand. But what else is it used for
Consider the characteristics of chordates and examine them in terms of the developing human embryo to see how it fulfills the chordate criteria.
In 1958 federal law restricted the movement of soil and plants from areas where fire ants were established. Why was this law ineffective in stopping the spread of fire ant colonies.
Discuss the difference between structural colors and colors based on pigments? How do the chromatophores of vertebrates and cephalopod molluscs differ in structure and function?
What is the yield of ATP when each of the following substrates is completely oxidized to CO2 by a mammalian cell homogenate.
A fundamental difference between eukaryotic viruses with DNA genomes versus those with RNA genomes is. Most eukaryal DNA viruses replicate in the host cell nucleus while most eukaryal RNA viruses replicate in the cytoplasm.
Which of the statements best describes the shape of its teeth? How many teeth does it have in the premaxilla.
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