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Chromosome, the microscopic threadlike part of the cell that carries hereditary information in the form of genes.A defining feature of any chromosome is its compactness. For instance, the 46 chromosomes found in human cells have a combined length of nm (1 nm = 10 − 9 metre); if the chromosomes were to be unraveled, the genetic material they contain would measure roughly 2 metres (about 6. In sexual reproduction, offspring arise from the union of specialized sex cells — a female egg and a male sperm. Just before the rediscovery of Mendel's work, careful studies were made of chromosome behavior during the formation of sex cells (meiosis). There are 46 chromosomes (23 pairs) in a human body cell with the exception of the sex cells. One of each pair is inherited from the mother's egg, the other from the father's sperm.

Chromosomes in human sex cell
Chromosomes in human sex cell

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Chromosomes in human sex cell
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