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Humans have 23 pairs of chromosomes. 22 pairs are homologous (basically same shape) and the last pair is known as the X and Y sex-determining chromosomes. You were correct that 23 come from mom and the other 23 from dad.

With regard to the question about genes, scientists finished sequencing the human genome in 2003. They found that the genome contained only 20,000-25,000 genes. You can read more about it if you search for human genome project on the net.

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