The chromosome determines the traits, which will be passed to offspring.
What is a chromosome?
Within the nucleus of the cell, the molecule of DNA is packed into the thread-like compositions known as chromosomes. Each of the chromosome is formed of DNA, which is tightly coiled several times around the proteins known as histones.
The prime function of a chromosome is to carry the DNA and transfer the genetic information, which is passed from the parents to the offspring, that is, from one generation to another. The chromosomes are also accountable for the synthesis of protein, gene regulation, and replication of cell.
Thus, the correct answer is option a, that is, chromosome.
Find out more information about chromosomes here:
https://brainly.com/question/1480756
