The number of chromosomes in the human cell is said to be forty-eight.
A daughter-nucleus is reconstructed in each cell from the chromosomes.
We now know that these chromosomes are the actual controllers of heredity.
Every cell in our bodies has its nucleus with its equipment of chromosomes.
In every one of these cells the chromosomes are arranged in pairs.
That means that there is a determiner for it which is grouped with other determiners in one of the chromosomes.
These chromosomes in a given plant or animal are always constant in number.
After the extrusion of the polar bodies there are 24 chromosomes in the egg.
The result of this is that half the number of chromosomes in the ovum are lost.
The chromosomes fuse in pairs (Conjugation of the Chromosomes, Boveri, 1892).