When 50% of all offspring are recombinants, geneticists say there is a 50% frequency of recombination.
A 50% frequency of recombination is observed for any two genes that are located on different chromosomes and are therefore unlinked.
This is a result of independent assortment. When two genes are close together on the same chromosome, they do not assort independently and are said to be linked.
That's a tricky question. The percentage of slave OWNERS in the South was about 4.8% (which would make the percentage uninvolved about 95%). However, if the question is also referring to Southerners who neither owned slaves nor had any economic interest in maintaining slavery/the plantation system, that number is about 75%.
The answer to who built the giant temples of the pharaohs is peasants during the flood season.