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Drosophila strain Ly (Lyra), Sb(stubble) and br (brown) wascrossed with a wild type strain. The F1 females were crossedto + ,+, br homozygous males. The F2 were collected andcounted. The table below shows the results obtained.Phenotype offlies NumberLy, Sb,br 404Wildtype(+,+,+) 422Ly, +,+ 18+, Sb,br 16Ly, +,br 75+, Sb,+ 59Ly, Sb,+ 4+, +,br 2
a) Draw a diagram to show the genetic crosses involved.b) Find the genetic distances between the three genes.c) Calculate the coefficient of coincidence and alsointerference.
q. john phillips in 1860 used the idea of sedimentation to estimation the earths age. based on the rate of
Identify two materials (biomaterials) used in the development of bioengineered products (for example, polycaprolactone, collagen).
An isolated piece of skeletal muscle tissue is genetically engineered so that gap junctions are expressed in muscle fibers. Create a plot of the length-tension relationship for this modified muscle tissue.
Ovules from a pure-breeding yellow plant are fertilized with pollen from a pure-breeding green plant. All of the progeny are yellow. When the reciprocal cross is performed, all of the progeny are green.
prior to 1950 the death rate was high which kept the numbers of humans from increasing rapidly. in the 19th century the
The effect of various metal ions on alkaline phosphatase (AP) activity. Each metal ion was added at 10 mM concentration, except zinc, which was added at 0.5 mM.
Why is the San Joaquin Valley one of the most hazardous places in the country with respect to air population.
Define stable equilibrium in population genetics (1). Describe two ways by which natural selection can lead to a stable equilibrium over several generations (2). Give an example of one of them (1). Describe how the equilibrium is maintained (1).
In close comparison, external fertilization often yields more offspring than internal fertilization. However, identify one advantage of internal fertilization over external fertilization.
In humans the gene for right handedness is dominant to the gene for lefthandedness. A man and a women both heterzygous for this trait to marry. What percent of thier children.
You sample a population of Salmonella typhimurium from a popular local hamburger joint Howdyburger. You find 9 isolates (clones) that are resistant to the antibiotics ampicillin and kanamycin, 32 isolates that are resistant to amipicillin but susc..
q1. both endocrine and nervous systems are major regulating system of the body though nervous system has been compared
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