Meiosis
Meiosis formation of gametes sperm and egg (haploid) fertilization—uniting to form a diploid zygote “reduction and division”
Fertilization Sperm and egg uniting
Haploid vs. Diploid Cells having two sets of chromosomes are diploid (2n). Haploid cells (1n) have only one set of chromosomes.
Meiosis Phases Meiosis I includes prophase I, metaphase I, anaphase I, and telophase I. Meiosis II includes prophase II, metaphase II, anaphase II, and telophase II.
Development of Gametes Spermatogenesis is the process by which sperm cells are produced. Oogenesis is the process that produces mature egg cells.
Chromosome Numbers Sex Chromosomes Sex chromosomes are chromosomes that determine the sex of an organism. Autosomes All of the other chromosomes in an organism
Female Male
Down Syndrome Karyotype (trisomy 21)
Crossing Over Crossing-over, which is when portions of homologous chromosomes exchange genetic material, occurs during prophase I and results in genetic recombination.
Mitosis vs. Meiosis Meiosis leads to four haploid cells (gametes) rather than two diploid cells as in mitosis.
Mitosis vs. Meiosis mitosis v meiosis