Biology, 12.09.2019 21:30 itsjoke5550
Ayeast strain that cannot grow in the absence of the amino acid histidine (his—) is mated with a yeast strain that cannot grow in the absence of the amino acid lysine ( among the 400 unordered tetrads resulting from this mating, 233 were rd, 11 were npd, and 156 were t. a. what types of spores are in the pd, npd, and t tetrads? b. what is the distance in map units between the his and lys genes? c. assuming that none of these tetrads was caused by more than two crossovers between the genes, how can you estimate the number of meioses that generated these 400 tetrads in which zero, one, or two crossovers took place? d. based on your answer to part c, what is the mean number of crossovers per meiosis in the region between the two genes? e. the equation rf 100 x (npd + 1/2 t) / total tetrads accounts for some, but not all, double crossovers between two genes. which double crossovers are missed? can you extrapolate from your answer to part d to obtain a more accurate equation for calculating map distances between two genes from the results of tetrad analysis? f. using your corrected equation from part e, what is a more accurate measurement of the distance in map units between the his and lys genes?
Answers: 2
Biology, 21.06.2019 14:30, goonnation9311
Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.
Answers: 1
Biology, 21.06.2019 21:00, devinwilson369
What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones
Answers: 3
Biology, 22.06.2019 13:00, minecrafter3882
Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.
Answers: 3
Ayeast strain that cannot grow in the absence of the amino acid histidine (his—) is mated with a yea...
Chemistry, 19.11.2020 15:50
Business, 19.11.2020 15:50
History, 19.11.2020 15:50
Chemistry, 19.11.2020 15:50
English, 19.11.2020 15:50
Social Studies, 19.11.2020 15:50
Mathematics, 19.11.2020 15:50
SAT, 19.11.2020 15:50