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This is not as hard, as it first seems. Lets have a look at the single enzyme digests first: The digest with enzyme A and B only leads to products which are 5kB (5000 bp) away from each other. Since they are of the same size, both equally sized restriction fragments appear as one band. So each enzyme cuts the plasmid exactly in half. The double digest is a ...


1

I assume that the figure comes from a section on genetic drift (since this seems likely), and it shows how the allele frequency will change over time under drift in a diploid population. So in short, each line represents the distribution of allele frequencies in different hypothetical populations, that all started with the allele frequencey p=0.5. As for ...


0

I think I have this figured out. Had to do some math. With our 4 nucleotide system, the number of possible codons is 43 = 64. That is number of nucleotides to the codon length power. The question asks us to determine codon length while giving us the number of amino acids and an upper limit on tRNAs. Using the same formula, #Nucleotides(Codon-Length) = ...


2

The comment by @fileunderwater is apt: stress-response-related genes are genes that are activated during stress, such as exposure to heat. In bacteria, for example, there are heat-shock proteins that are involved in keeping the tertiary structure of proteins (folding/3D shape) intact during periods of heat exposure. Genes encoding these heat shock proteins ...


3

Your answer to a) is correct (standard Hardy-Weinberg equation). For b) you have to consider that you are calculating proportions of the population, which should sum to 1. Since 30% of the AA individuals and all SS individuals die, this is not the case after selection, which is why you should divide the frequencies by the total proportion that survive (also ...



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