Through the duplication and modification of pre-existing genes.
Answer:
The percentage of the non-singing trait in female birds in Generations 4 and 5 if this pattern continues will be 80 and 94
Explanation:
The percentage of the singing trait in female birds in Generations an 5 if, the pattern continues, is 26 and 18 respectivelyFor the non-singing females, we can see that 8 was added to the first term to get the second term. 10 was added to the second to get the third
For the 4th term, 12 will be added to the third term;
T4 = 68 + 12
T4 = 80
For the 5th term, 14 will be added to the fourth term;
T5 = 80 + 14
T5 = 94
Hence the percentage of the non-singing trait in female birds in Generations 4 and 5 if this pattern continues will be 80 and 94
