Answer:
Homozygous.
Explanation:
As the exercise describes, when the first 22 chromosomes contain hundreds of genes in the same positions and sequence. If the code of the gene from one parent is exactly like the code on the same gene from the other parent, the gene pair is called homozygous. This is a genetic condition in which an individual has inherited the same DNA sequence, for a particular gene, from both their biological parents, therefore, having two identical copies of a particular gene.
Many rivers make up pieces between the US-Canadian border
Detroit River, Halls Stream: New Hampshire - Quebec, Monument Creek, Niagara River, Pigeon River: Minnesota - Ontario, Rainy River: Minnesota - Ontario, St. Clair River: Michigan - Ontario, St. Croix River: Maine - New Brunswick, St. Francis River Maine - Quebec, St. John River: Maine - New Brunswick, St. Lawrence River, St. Marys River