Tae een ye Nae eee eee ee 
648 PHARMACEUTICAL BOTANY 
genotype. ‘The term phenotype is used to describe that part of the 
inheritance that appears in the individual. Forms alike in body 
characteristics irrespective of their genetic constitution are of the 
Mononysrips.—A monohybrid is an individual whose 
parents differ with respect to one character. ee 
Fic. 485.—Diagram illustrating the results obtained from crossing a variety 
of garden pea breeding true to smooth cotyledons with one breeding true to wrinkled 
cotyledons. (Gager.) 
RESULTS OF CROssING INDIVIDUALS WITH ONE PAIR 
OF CONTRASTING CHARACTERS 
Mendel first made sure the characters with which he was to 
work were constant for certain varieties and then began crossing 
one variety with another which differed from each other in some 
of the previously mentioned characters, studying the offspring of 
several successive generations with respect to the behavior ot the 
contrasting characters. 
In every instance he found that the plants that developed 
from the cross involving a single pair of alternative characters 
