In ancient Greece, a mutation arose that resulted in some sheep with Golden Fleece compared to the regular white fleece. However, it was discovered that true-breeding golden-fleeced sheep were impossible to obtain.
What does it mean by true breeding? (2 marks)
What is required for a line to become true breeding? (2 marks)
Propose a genetic reason (hypothesis) why true-breeding golden fleeced sheep may not be possible. Include in your answer symbols to indicate how the phenotypes are related to genotypes. (4 marks)
What phenotypic ratio would you expect in the progeny if you crossed two sheep both having golden fleece, using your hypothesis? (4 marks)