A multicellular species' ovum (egg) is where a member of that species' life cycle begins.
The human ovum always contains 22 human chromosomes plus an X, for a total of 23. The cell I contains a single complete set of human chromosomes.When an organism's cells only have one set of chromosomes, the organism is said to be haploid. All organisms that reproduce sexually are diploid (having two sets of chromosomes, one from each parent). Only the egg and sperm cells in humans are haploid.
each chromosome is present in only one copy. Human gametes (egg and sperm cells) have one sex chromosome, 22 autosomes, and are haploid. Since humans are diploid, the majority of their cells have 23 pairs of chromosomes. However, human gametes (egg and sperm cells) are referred to as haploid because they only have one set of chromosomes.
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