In an organism of genotype Aa, half the reproductive cells carry 'A' and half carry 'a'. Mendel called this

The correct answer is - Segregation

Explanation:

An organism with the genotype Aa whose half of the reproductive cell or gametes carry A and the rest of the gametes or reproductive cell carries allele a. According to the laws of Mendel, it is the law of Segregation.

In a diploid organism, the genotype of an individual possesses a pair of alleles (50-50 %) for any particular character and is passed one of each to next-generation from each parent.

it has one origin of replication, but it proceeds in two directions - d)

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it