What part of an organism's genetic makeup is received from its mother?

An organism receives half of its genetic makeup from its mother. This is done through the process of sexual reproduction, where the mother contributes one set of 23 chromosomes to the offspring. These chromosomes are contained in the egg cell, which is fertilized by a sperm cell from the father, which also contains 23 chromosomes. The combination of these two sets of chromosomes creates a unique genetic makeup for the offspring. This includes both autosomal chromosomes, which carry the majority of the genetic information, and one sex chromosome, which determines the sex of the offspring (X from the mother and either X or Y from the father).