Chapter 5: Patterns of Inheritance. Early Ideas of Inheritance. Pangenesis (~300 BC) Greek philosopher Aristotle proposed that the egg and sperm contained “ pangenes ” derived from all parts of the body. When fertilized, pangenes developed into the parts of the body from which they came.
Pangenesis (~300 BC)
All these theories were developed to explain different observations, but there was no scientific evidence that proved them true.
Results of the monohybrid cross:
P generation x
F1 generation 100%
F1 generation x
F2 generation 3 : 1
The allele for yellow seeds was dominant
While the allele for green seeds was recessive
P cross yy x YY
F1 generation Yy 100%
F1 Cross Yy x Yy
F2 generation 25% yy : Yy/YY 75%