Answer: you cannot use a punnet square to find the percentages of The offspring unless you have the genotypes of the parents. For example, is the white trait recessive? This means it will be homozygous lowercase (bb". Are the black feathers dominant, if they are, is it heterozygous or homozygous? (BB or Bb) Read the question because genetics is not rocket science.
Explanation: I am High School Biology teacher and this is one of the best contents of biology, watch a couple videos to figure this out