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strain of flies carrying the dominant eye mutation Lobe on the second chromosome was crossed with a strain homozygous for the second chromosome recessive mutations smooth abdomen and straw body. The F1 Lobe females were then backcrossed with homozygous smooth abdomen, straw body males and the following phenotypes were observed:
smooth abdomen, straw body 820Lobe 780smooth abdomen, Lobe 42straw body 58smooth abdomen 148Lobe, straw body 152
(a) Give the gene order and map units between these three loci - draw the map!.
(b) What is the coefficient of coincidence?
The first of the two "undeniable facts" is that any localized population of a species has the potential to produce far more offspring than the local environment can support.
Assume many of the atoms of nitrogen in a double-stranded molecule of DNA, of isotope N-14, were replaced with the isotope N-15
A deficiency of carnitine results in muscle cramps, which are increased through exercise or fasting. ATP is required for muscle contraction.
Myasthenia gravis is an autoimmune disease affecting the neuromuscular junction. In myasthenia gravis, weakness occurs when the nerve impulse to initiate or sustain movement does not adequately reach the muscle cells.
What are the two most numerous terrestrial groups of arthropods? which of these contains many flying species?
give the main functions of microfilaments in the cell.
Once concept of evolution has been based on the idea that a new kind of organism would emerge by a sudden, large mutation in an individual.
Would you expect an ectoparasite, such as a bird louse, that lives its entire life on the body of a homeothermic host, to have a broad thermal tolerance and what about the mite that lives on the bodies of rattlesnakes?
What results would you expect if your unknown contained riboflavin, pryidoxine, or both?
A geneticist crosses a pure breeding strain of peas producing yellow, wrinkled seeds with one that is pure breeding for green, smooth seeds.
Consider a population of 100 individuals and the frequency of the A allele is 0.6 and the frequency of the a allele is 0.4. If the following fitness values for each genotype are applied to the next generation, what will be the frequency of the A a..
Name the bones of pectoral girdle and the bones of the pelvic girdle. Evaluate the pectoral and pelvic girdles with regard to strength, versatility, and function.
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