Final answer:
d. All of the answers are correct. Short generation times, producing large numbers of offspring, and being easily crossed are necessary characteristics of an organism to easily construct a genetic linkage map.
Step-by-step explanation:
In order to easily construct a genetic linkage map, an organism should have the following necessary characteristics:
- Short generation times: Organisms with short generation times allow for quick breeding and the production of multiple generations, which increases the chances of observing recombination events.
- Produce large numbers of offspring: Having a large number of offspring provides a larger sample size for studying recombination frequencies and mapping genes.
- Easily crossed: Organisms that can be easily crossed allow for controlled mating experiments to analyze the inheritance patterns of different genetic markers.
Therefore, the correct answer is d. All of the answers are correct.