Human sperm cell karyotype

Credit: LOOK AT SCIENCES/SCIENCE PHOTO LIBRARY

Caption: Human sperm cell karyotype. A karyotype is the complete set of chromosomes of an organism. However, this karyotype comes from a sperm cell and so has only the haploid (half, 23) number of chromosomes. If the sperm cell fertilises an egg cell the chromosomes from the egg cell will join with these chromosomes to form a whole genome of 46 chromosomes arranged in 23 pairs.

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