Answer:
Option (D).
Explanation:
Recombination frequency nay be defined as the the frequency of crossover of a single chromosome during meiosis. The maxiumum recombination frequency is 50%.
Genes that has recombination frequency nearly equal to 50% are considered as unlinked genes. Unlinked genes cannot undergo the recombination process and may have equal chances to inherit together or can inherit separately in the next generation.
Thus, the correct answer is option (D).
Well I think I might know this since I was born and grew up in WI, but don't be 100% dependent with my answer because I'm only in 7th grade and I am doing high school stuff. Well my guess is the proportion of the genes is 1/2 because when a offspring is produced the genes are split from each parent rather its a human baby, a mammal, a fish, a reptile, a insect, or a plant. Although, I don't know what f1 means except for it being a control on the computer lol. But like I said I'm only in 7th grade so I don't know everything but I'm smarter than a average 7th grader.
Hope this helps! (it probably wont though)