This problem has been solved! see the answeryou have a dna sequence of 1600 bp. to characterize it, you decide to make a restriction map. cutting with the first enzyme, you show by electrophoresis that the fragments produced are 400 and 1200 bp respectively. after using the second enzyme, you recover 700-bp and 900-bp fragments. after treatment with both enzymes, fragments were 300, 400, and 900 bp. which is the correct map? you have a dna sequence of 1600 bp. to characterize it, you decide to make a restriction map. cutting with the first enzyme, you show by electrophoresis that the fragments produced are 400 and 1200 bp respectively. after using the second enzyme, you recover 700-bp and 900-bp fragments. after treatment with both enzymes, fragments were 300, 400, and 900 bp. which is the correct map? a.) -400/--/300 .) -300-/--400--/--.) -400-/300-/.) -400-/-100/--300--/900e.) -900 /400--/

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

Which of the following terms best matches this definition: the process where humans choose the traits that will be present in the next generation through breeding. question 4 options: genetic determinism artificial selection acquired selection natural selection

Protein and polypeptide sequences can be determined by first partially hydrolyzing the protein or polypeptide followed by amino acid sequencing of the fragment pieces using the chemical degradation process known as edman degradation. determine the sequence of the initial (18-amino acid) polypeptide that produces the following five partial sequences after hydrolysis and edman degradation.