Question

Explain the purpose of a molecular clock and the properties that a section of protein must have to be used in this way. <----- really need help !

Answer 1

Did you also have a genetics question up? Did you solve that?

Answer 2

yeahh

Answer 3

so far i have, "The purpose of a molecular clock is to determine how long ago the organisms diverged,"

Answer 4

that's a good start :)

Answer 5

The molecular clock (based on the molecular clock hypothesis (MCH)) is a technique in molecular evolution that uses fossil constraints and rates of molecular change to deduce the time in geologic history when two species or other taxa diverged. It is used to estimate the time of occurrence of events called speciation or radiation. The molecular data used for such calculations is usually nucleotide sequences for DNA or amino acid sequences for proteins. It is sometimes called a gene clock or evolutionary clock.