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A population of sexually reproducing organisms with non-overlapping generations has two alleles: A1 and A2; p is the frequency of A1, q is the frequency of A2 (p+q=1). Allele A2 is recessive and lethal when in homozygous genotype (i.e. fitness of A2A2 is zero). Fitness of heterozygote is the same as that of dominant homozygote (full dominance for fitness).
Assume q=0.01. Calculate allele and genotype frequencies for three successive generations of this population (directional or purifying selection). Explain why delta p will change with generations.
Describe the order of evolutionary events going from a lineage of small carnivorous dinosaur to modern-looking bird. Describe the evidence in support of this evolutionary sequence.
Which of the following is true regarding a dihybrid cross.
Some times in the movie, politics of science were discussed. Explain how politics played a role in the discovery of DNA structure. Do you think the science of today is more or less political than it was during the 1950s? Examine one instance of moder..
What is the connection among ribosomes, endoplasmic reticulum, golgi apparatus and the plasma membrane? How do they work together in the system.
Describe some of the physiological changes that happen to the cell membranes of a rainbow trout as it acclimatizes to cold, water at 4 degrees Celsius, after living at 16 degrees Celsius for a long time?
Determine the diploid number (2n) of the following unknown organisms from the cell observations given below. Draw what each cell looks like at the indicated stage, including all important cytological features.
A population of mice can have either black (B) or white (b) fur and long (L) or short (l) tails. Suppose if this is the gamete pool for the parental generation, what is the expected frequency of B/l:b/l zygotes in the next generation,
Think about the trp operon. For each condition below, indicate whether the cell will synthesize the enzymes coded by trpE, trpD, trpC, trpB, and trpA and be able to synthesize trypophan.
A 4 year old boy falls on a rusty nail and punctues his skin. The wound is cleaned and covered with sterile gauze. Which of the following is the initial events in the healing process.
Rotonone inhibits Complex I Cyanide inhibits Complex IV Oligomycin inhibits ATP synthase You incubate isolated intact mitochondria in a buffered solution containing NADH, ADP plus Pi.
You have a solution that is a mixture of two compounds, A and B. The molar extiniction coefficient of substance A at 260 nm and 280 nm is 5248 and 3150 respectively.
A mole of an assured compound contains 207.7 g of lead and 32.00g of oxygen. Without doing any calculations, tell whether a formula Unit of a compound contains more atoms of lead or more atoms of oxygen. Explain in details.
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