1 _ab_ class produce only _ab_’s.
3 {1 _aB_ class may produce either all _aB_’s, {2 _or_ both _aB_’s and _ab_’s.
From Mendel's Principles of Heredity: A Defence by William Bateson.
1 _ab_ class produce only _ab_’s.
3 {1 _aB_ class may produce either all _aB_’s, {2 _or_ both _aB_’s and _ab_’s.