Exercise 15 (Continued) 



Ste-p 4, — Plot on the following diagram at least two characters which are 

 sex-linked in their mode of inheritance. 



Ancestral Generation. II | | 

 t ^ t 



F2 Generation. 



DEXODODOOOOOOOOO 



Note — Additional diagrams may be drawn on blank page to show 

 behavior of additional characters. 



Leading Questions. — 1. What do you understand as Mendel's law of 

 mathematical inheritance? 



2. What do you understand as Mendel's law of dominance? 



3. Name ten dominant characters and their corresponding recessive 

 characters? 



4. In what generation does Mendel's law of segregation begin to act? 



5. How is gametic purity harmonized with an analysis of Mendel's law? 



6. What do you understand by the 1st, 2nd, 3rd, etc., filial generation? 



7. How do you explain the uniformity of progeny from an original 

 cross, and the great variability of progeny of future generations from 

 this cross? 



8. Enmnerate the commercial possibilities from an understanding of 

 sex-controlled inheritance. 



59 



