﻿AND 
  STARCH 
  CHARACTERS 
  IN 
  CORN 
  175 
  

  

  can 
  be 
  propagated 
  vegetatlvely 
  than 
  one 
  which 
  can 
  only 
  be 
  pro- 
  

   pagated 
  by 
  seed. 
  It 
  seems 
  to 
  me 
  that 
  the 
  evidence 
  suggests 
  that 
  

   the 
  general 
  occurrence 
  of 
  intermediates 
  as 
  a 
  result 
  of 
  crossing 
  is 
  

  

  + 
  

  

  due 
  not 
  only 
  to 
  the 
  bringing 
  together 
  of 
  divergent 
  or 
  contrasting 
  

   pairs 
  of 
  characteristics 
  but 
  to 
  the 
  exigencies 
  of 
  sexual 
  reproduction 
  

   itself. 
  It 
  is 
  easy 
  to 
  say 
  that 
  the 
  combination 
  of 
  two 
  equivalent 
  

   things 
  cannot 
  result 
  in 
  variation 
  but 
  aside 
  from 
  the 
  question 
  as 
  

   to 
  whether 
  male 
  and 
  female 
  gametes 
  ever 
  are 
  equivalents 
  in 
  any 
  

   very 
  strict 
  sense 
  it 
  seems 
  also 
  obvious 
  that 
  the 
  pairing 
  of 
  such 
  

   confplex 
  colloidal 
  systems 
  as 
  are 
  the 
  germ 
  cells 
  constitutes 
  for 
  

   each 
  of 
  the 
  two 
  individually 
  as 
  well 
  as 
  for 
  the 
  diploid 
  unit 
  which 
  

   is 
  coming 
  into 
  being 
  an 
  especially 
  critical 
  stage 
  whose 
  end 
  result 
  

   may 
  very 
  well 
  show 
  considerable 
  fluctuating 
  variability 
  and 
  in 
  

   turn 
  result 
  in 
  fluctuating 
  congenital 
  variability 
  in 
  the 
  progeny. 
  

  

  An 
  ear 
  of 
  corn 
  with 
  its 
  large 
  numbers 
  of 
  easily 
  preserved 
  and 
  

   studied 
  individual 
  examples 
  of 
  such 
  fusions 
  produced 
  under 
  

   conditions 
  involving 
  a 
  minimum 
  of 
  environmental 
  variation 
  is 
  

   very 
  favorable 
  material 
  for 
  the 
  recognition 
  of 
  such 
  fluctuations. 
  

   To 
  be 
  sure 
  ears 
  of 
  pure 
  bred 
  races 
  may 
  show 
  striking 
  uniformity 
  in 
  

   their 
  kernels 
  especially 
  in 
  the 
  starchy 
  races 
  but 
  in 
  the 
  sugar 
  corns 
  

   variations 
  in 
  the 
  degree 
  of 
  wrinkling 
  are 
  as 
  I 
  have 
  found 
  by 
  no 
  

   means 
  rare 
  occurrences. 
  We 
  must 
  recognize 
  without 
  doubt 
  as 
  

   has 
  long 
  been 
  obvious 
  to 
  the 
  systematists 
  fluctuating 
  variability 
  

   in 
  the 
  character 
  of 
  species 
  as 
  to 
  their 
  tendency 
  to 
  constancy 
  or 
  

   variability 
  in 
  their 
  seed 
  progeny. 
  Some 
  species 
  or 
  races 
  show 
  a 
  

   high 
  degree 
  of 
  fixity 
  of 
  type 
  while 
  others 
  are 
  just 
  as 
  truly 
  charac- 
  

   terized 
  by 
  their 
  variability. 
  There 
  is 
  nothing 
  Inconsistent 
  with 
  

   such 
  facts 
  in 
  what 
  we 
  know 
  of 
  the 
  relative 
  fixity 
  of 
  the 
  physical 
  

   characteristics 
  of 
  various 
  substances 
  In 
  the 
  colloidal 
  condition 
  and 
  

   of 
  colloidal 
  systems 
  made 
  up 
  of 
  varying 
  proportions 
  of 
  the 
  different 
  

  

  elements 
  or 
  of 
  different 
  colloids. 
  

  

  What 
  is 
  true 
  however 
  of 
  the 
  chances 
  of 
  fluctuating 
  variability 
  

   in 
  the 
  offspring 
  of 
  gametes 
  from 
  individuals 
  of 
  the 
  same 
  so-called 
  

   pure 
  race 
  is 
  doubly 
  true 
  In 
  the 
  case 
  of 
  crosses 
  between 
  races 
  differ- 
  

   ing 
  in 
  one 
  or 
  more 
  characters. 
  That 
  the 
  pairing 
  of 
  germ 
  plasms 
  

   from 
  congenitally 
  different 
  parents 
  should 
  regularly 
  and 
  In 
  every 
  

   species 
  result 
  merely 
  in 
  a 
  shufiling 
  of 
  fixed 
  unit 
  factors 
  is 
  out 
  of 
  har- 
  

   monv 
  with 
  what 
  we 
  know 
  of 
  the 
  ordinary^ 
  behavior 
  of 
  such 
  viscid 
  

  

  