I think that the traced the organisms back to their ancestors<span />
1,300 in a human cell.
Ignore this bit, it won't let me post it unless it's over 20 words. i hope you get your paper done.
Answer: In this case, only one genotype is possible. All offspring are Yy and have yellow seeds. In the P generation, pea plants that are true-breeding for the dominant yellow phenotype are crossed with plants with the recessive green phenotype. And their is your answer.
Explanation: