question_answer

Rice has a diploid genome with \[2\,n=24.\] If crossing over is stopped in a rice plant and then selfed seeds are collected, will all the off springs be genetically identical to the parent plant?

A) yes, because crossing-over is the only source of genetic variation

B) no, because stopping of crossing over automatically increases rate of point mutation

C) yes, only if the parent plant was a completely inbred line

D) yes, only if the parent plant was a hybrid between two pure-bred lines