Menarche


The time in a girl’s life when menstruation first begins. During the menarche period, menstruation may be irregular and unpredictable. Also known as female puberty.

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  • Mendel, Gregor

    The father of genetics, the Moravian/Bohemian biologist who in the 19th century set forth the basic laws that constitute the foundation of classical genetics. Mendel’s controlled experiments with breeding peas in the monastery garden led him to conclude that the heritable units (now called genes) were not blends of parental traits, but rather were separate […]

  • Mendelian

    Referring to Gregor Mendel or his theories.

  • Mendelian inheritance

    The manner by which genes and traits are passed from parents to their children. The modes of Mendelian inheritance are autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. Also known as classical or simple genetics.

  • Mendelism

    mathematics, botany, physics, and meteorology. His meticulous controlled experiments with breeding peas in the monastery garden led him to conclude that the heritable units (now called genes) were not blends of parental traits but rather were separate physical entities passed individually from one generation to the next. The report in 1865 of Mendel’s discoveries went […]

  • Menetrier disease

    Giant hypertrophic gastritis.


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