Incomplete dominance.
<P>
   When  red  snapdragons  are  crossed with white ones, the F[1] hybrids
   have pink flowers.
<P>
   Superscripts  indicate  alleles  for flower color: C^R for red and C^W
   for white.
<P>
   The  F[2]  generation  produces  a  1:2:1  ratio for both genotype and
   phenotype.
<P>
   Exercise:  <A ClAsS=ACT Href="http://media.pearsoncmg.com/bc/bc_campbell_biology_7/media/activities/load.html?14&amp;D" oNClick="popact('http://media.pearsoncmg.com/bc/bc_campbell_biology_7/media/activities/load.html?14&amp;D');txtcolor('incomplete_dominance1','gray');return false;" Id=incomplete_dominance1><iMg sRc="/images/tutorial.gif" aLt='' boRDer=0></A>