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Genes a, b, and c are known to be in that linear order in an organism. A testcross is done that yields 20 double crossover progeny out of a total of 1000 offspring. Assume that there is no interference.
(a) Type a genetic map showing the distances between these genes. Is there more than one possible map?(b) What would the distances be if there was 10% interference?(c) What number of double crossover progeny would be expected if there was interference of 15%?
A white-fruited squash plant when crossed with a yellow-fruited one produces offspring about half of which are white and half yellow. What are the genotypes of the parents?
Describe how the one splicing mechanism we descrived in class works. Also explain how alternative splicing works as well as its significance. Be specific.
Homologous chromosomes separate and are pulled to opposite sides of the cell during what stage of cell division? (Read each option carefully.)
Early in development, most human cells turn off expression of essential component of telomerase, enzyme responsible for addition of telomere repeat sequences to ends of chromosomes.
Briefly describe five factors that decrease the stability of an helix. Include examples of specific amino acids with each factor that would act to destabilize a helix.
The ß-hemoglobin locus in humans is implicated in resistance to falciparum malaria. Estimates of fitness vary geographically, but assume that, in one particular area with endemic malaria,
What hormone do the adrenal glands produce. An uncold-worked brass specimen of average grain size 0.008 mm has yield strength of 170 MPa. Estimate the yield strength of this alloy (in MPa) after it has been heated to 600°C for 1260 s, if it is known ..
What is the portal for selective export of mRNA out of the nucleus? When microtubules grow out of a centrosome, which end is oriented away from the centrosome?
Some restriction enzymes produce fragments that have single stranded ‘sticky ends', while other enzymes do not leave single stranded ends.
Determine which of the following pairs of functional groups CANNOT react with each other by a dehydration reaction?
In pea plants, purple flower color is dominant to white flower color. Consider a cross between one pea plant that is heterozygous and another pea plant that is homozygous recessive. What proportion of the offspring will have white flowers?
In each of the trials recorded in Table 20-2, contrast the amount of phosphate that moved into an onion plant that is mycorrhizal with the phosphate in an onion plant that is non-mycorrhizal. What conclusion do you reach?
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