Chapter 7, Problem 24PDQ

Summary Introduction

To review:

The importance of cytological markers (chromosomal knob and translocated segment) in Creighton and McClintock’s experiment.

Introduction:

A cytological marker is the one which can be readily detected by cytological techniques. Harriet Creighton and Barbara Mcclintock demonstrated in 1932 that the recombination of the genes which are linked to a chromosome needs the actual physical exchange of parts or segments of the chromosome with its homologue.