chromosome…

Medical experts recommend this detailed explanation.

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chromosomes, dna, chromosomes, long pieces of dna contained, in the nucleus of cells, chromosomes come in pairs, in humans, nucleus of each cell has 23 pairs of chromosomes, 46 total chromosomes, dna is also found in another part, the cell, the mitochondrion, mitochondria have own dna strand, "the 47th chromosome", all of genes, contained, 46 nuclear chromosomes, 1 mitochondrial chromosome, two, the chromosomes, x, y chromosome, determine gender, sex chromosomes, females have 2 x chromosomes, males have 1 x, 1 y chromosome, y chromosome determines the male gender, does little else, remaining chromosomes, autosomal chromosones, convenience, scientists have numbered these chromosome pairs 1, 22, each parent contributes one half of each chromosome pair to child, 22 autosomal chromosomes, 1 sex chromosome, mother always contributes an x chromosome, child, father, contribute an x, a y, the father that determines the gender, the child, mitochondrial chromosome comes, mother, fathers make no contribution, mitochondrial offspring, autosomal dominant, autosomal recessive, genetic counseling, prenatal diagnosis, sex-linked dominant, sex-linked recessive, detailed information, heredity, disease, genetics.