What begins with a diploid cell and ends with four haploid cells?
- Correct Answer: urinalysis
- electrolysis
- mitosis
- meiosis
Explanation: Fertilization joins haploid gametes into a diploid zygote. How do gametes end up with half the amount, a haploid amount, of DNA? The mechanism that produces haploid cells is meiosis. Meiosis is a type of cell division that halves the number of chromosomes. Meiosis is specific to gamete producing cells in the gonads. Meiosis begins with a diploid cell and ends with four haploid cells. These cells eventually differentiate into mature sperm or egg cells. During meiosis the pairs of homologous chromosomes separate and segregate randomly to produce gametes with one chromosome from each pair. Only germ cells like spermatocytes and oocytes, can undergo meiosis.
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