Previous genetic linkage crosses have determined that recombination frequencies are 6% for genes a and b, 4% for genes b and c, 10% for genes c and d, and 11% for genes d and e. the sum of these frequencies between genes a and e is 31%. why does the recombination distance between these genes as determined by adding the intervals between adjacent linked genes differ from the distance determined by the test cross?

Peat deposits are found in waterlogged places where dead plant material piles up. when peat is buried, it undergoes compaction. it is subjected to heat and pressure for a long time, and a lot of water is squeezed out during this process. nearly ten vertical feet of original peat material becomes one vertical foot of coal. which of these remains unchanged in the system during the conversion of peat to coal? a) area b) density c) mass d) volume