this means that the initial pairing may fail occasionally even in a relatively long interchanged segment and produce a t-shaped ( 3-armed ) configuration.-after the initial pairing has occurred , the average probability that a secondary site of pairing is adjacent to the centromere in a segment.3 to.4 the length of an arm is low ( .13 , ranging from.02 to.29 ) .-we can predict that in an intercross in which both breakpoints in both parental interchanges are far out on the chromosomes , `` '' pairs '' '' will be formed with nonhomologous ends ( homologous differential segments paired ) .
C0007709
centromere
C0008633
chromosomes