Chapter V 

 RECORDING OF DATA 



In recording genetic data in Habrobracon 

 juglandis, P. W. Whiting has simplified the con- 

 ventional methods. Mutants are symbolized by 

 the first letter or certain letters of the name 

 given the mutant; for example, gl stands for 

 glass, r for reduced, and gz for glaze. If the 

 mutant is recessive to its normal wild-type al- 

 lele, lower case letters are used; however, in 

 a few cases, the mutant is dominant to its nor- 

 mal allele, and it is then written with the 

 first letter of the symbol capitalized; for ex- 

 ample, Y stands for yellow, and Sk for speckled. 

 Normal or the usual wild-type alleles are sym- 

 bolized by the plus (+) sign. The plus sign is 

 used at all times to indicate the dominant al- 

 lele of any recessive character, but is omitted 

 from the male and female formulas wherever 

 possible. 



The following example will more clearly in- 

 dicate the method of writing £?enetic formulas 

 in Habrobracon studies. Let us, for example, 

 cross a homozygous mottled female by a reduced 

 male. The female would be indicated thus, 

 +.mo/+.mo. She is type for reduced and there- 

 fore the + sign need not be written in the for- 

 mula. She is also homozygous for mottled so it 

 would be permissible to merely write mo for her 



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