Final answer:
The accuracy of a mapping cross is higher with more offspring, as it provides a larger dataset for detecting genetic patterns. The predicted frequency of recombinant offspring ranges from 0% to 50%, depending on whether genes are linked. Option d. Lower accuracy with more offspring is the correct answer.
Step-by-step explanation:
The accuracy of a mapping cross is affected by the total number of offspring produced. With more offspring, the accuracy of the mapping cross is higher because a larger sample size provides more data, making it easier to detect patterns and frequencies of genetic recombination with greater statistical significance.
The correct option corresponding to this explanation would be b. Higher accuracy with more offspring.
When conducting a test cross for two characteristics, the predicted frequency of recombinant offspring cannot exceed 50%. This is because genetic recombination during meiosis will result in a maximum of 50% recombinants if the genes are unlinked.
If the genes are completely linked, the predicted frequency is 0% recombinants, as no cross-over would occur between the genes. Thus, option d. No, the predicted frequencies range from 0% to 50% is the correct answer.