122 



CHAPTER 16 



METAPHASE I 



B 



TELOPHASE II 



light apricot 

 weak forked 



light apricot 

 weak forked 



white 

 weak forked 



apricot 

 weak forked 



FIGURE 16-6. Genotypic and phenotypic consequences of no chiasma {A) and of one 

 type of chiasma (B) between marker genes in an attuched-X female of Drosophila. 



