Chromosomes exist in similar or ____ pairs, one from the mother and one from the father. In humans, there are 46 chromosomes in 23 pairs in all of our cells except for our reproductive cells (ova and sperm). These reproductive cells are called ____ and they have only one of each chromosome so they are ____ cells. All the other cells in our bodies are ____ cells because the chromosomes are in pairs - a combination of our parents' two genotypes.

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