Final answer:
Recombination frequency is the percentage of offspring that show a combination of traits different from those seen in the parents due to the exchange of genetic material during meiosis.
Step-by-step explanation:
This question is referring to the concept of recombination frequency in genetics. Recombination frequency is the percentage of offspring that show a combination of traits different from those seen in the parents due to the exchange of genetic material during meiosis. In this specific context, 50% of the progeny are heterozygous for a reciprocal translocation, which means that the translocation event occurred during the formation of gametes.
This reciprocal translocation involves the exchange of genetic material between non-homologous chromosomes, resulting in rearranged chromosome segments. When a reciprocal translocation occurs, some of the offspring will survive and be heterozygous, while others may not survive or have different combinations of genetic material.