guptaranu16072004

2) A pair of alleles, P and p determines spot colour in the purple sea hare, an attractive sea slug that is a popular addition to a saltwater aquarium. PP and Pp sea hares have light purple spots, and pp sea hares have bright yellow spots. To avoid the environmental impact to coral reefs caused by the poorly regulated and destructive ornamental trade, a local aquarium shop owner wants to breed some sea hares to sell. Because they are attractive, yellow-spotted purple sea hares are in high demand and can be sold for more money than the drab purple sea hares. However, true-breeding yellow-spotted sea hares breed poorly (i.e. not very fertile). So, the shop owner purchases a pair of purple-spotted sea hares, and these mate and produce, in the F1, 31 purple and 9 yellow-spotted offspring (which are sold). Given these results, what is the best strategy for this breeder to produce more yellow-spotted sea hares? (hint: you need to calculate the expected frequency of the yellow-spotted offspring for both scenarios below – show your work)

Circle the best breeding strategy:

Random crosses between pairs of F1s

F1 backcross to parents

^For this question i just want to know how to calculate each expected frequency, i cant seem to figure out how to do that part!

In island beography graphs, it is typical to put the dependentvariable on the y-axis and the independent variable on the x-axis.Explain why, in some labs, area is the independent variable andspecies is the dependent variable.

What is the dependent variable and why

Explain, in general how negative feedback works to regulate hormone release from the anterior pituitary?. 

NOTE: This is a difficult question involving gas laws in addition to reaction rates. 8. N2O4 decomposes to form NO2 in a second-order reaction: N2O4(g) ––> 2NO2(g) At 400.0 K, the rate constant for this reaction is 2.9 x 108 L/(mol · s). Suppose 0.222 mol of N2O4(g) is placed in a sealed 41.7-L container at 400.0 K and allowed to react. What is the total pressure inside the vessel after 32.9 ns has elapsed? A) 0.183 atm B) 0.175 atm C) 0.166 atm D) 0.524 atm E) 0.350 atm

Consider the following equilibrium:

N2O4g  2NO2g=       ΔG05.4kJ

Now suppose a reaction vessel is filled with 3.78atm of dinitrogen tetroxide N2O4 at 1107.°C. Answer the following questions about this system:

What are the chemical differences between a water-soluble hormone and a lipid- soluble hormone? What differences do they exhibit in:

1) how they travel through the body?

2) how they interact with their receptors?

3) what effects they induce once they have bound to their receptors?

Explain how a water-soluble hormone and a lipid-soluble hormone travel through the body and how it can exert its effects on the cell.?