Meiosis & Gametogenesis

 

Chromosomal Theory of Inheritance

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The discovery of chromosomes and brief overview of meiosis in the context of Mendel's work. Chromosome theory of inheritance-traits are carried on chromosomes that segregate when gametes form.

  • Watch video clip from Lecture 6 (41:50 - 49:25)

Brief overview of mitosis and meiosis and the segregation of chromosomes in the context of Mendel's theory.

  • Watch video clip from Lecture 7 (2:05 - 6:26)

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Fertilization and the combination of chromosomes from the egg and sperm. Chromosomes as the carriers of genetic particles.

  • Watch video clip from Lecture 22 (26:33 - 29:55)

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Genetic Linkage

Two traits that are on the same chromosome may not segregate independently. Genetic linkage reconciles Mendel's theory and the Chromosomal Theory of Inheritance.

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Meiosis–Overview

Explanation of steps and characteristics of meiosis. Definition: Meiosis I and II, chiasma

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Non-Disjunction

Inaccurate segregation of chromosomes. Trisomy and monosomy as result of defects in meiosis.

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Stages of Meiosis

Detailed description of steps of meiosis I and meiosis II and comparison to mitosis. Should use in conjunction with textbook diagrams.

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Meiotic Recombination

Explanation of homologous recombination that occurs during the prophase of meiosis I. Generation of new chromatids and chromosomes during recombination give rise to diversity.

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Errors in Meiosis

How errors in meiosis occur, and how these errors are manifested in the final organism.

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Gametogenesis

Lineages for the sperm and egg. Cell divisions and differentiations during the formation process.

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Hormonal Control of Gametogenesis

Hormones as long-range inducers for gametogenesis. Produced in the brain, travel through the blood stream to the ovaries and testes. Balance of various stimulatory and inhibitory hormones and feedback loop induce gametogenesis.

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Mitosis and Meiosis

Comparison between chromosomal segregation during mitosis, meiosis I and meiosis II and DNA recombination.

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Central Dogma–Example I

Transcription and translation of a given gene and DNA mutations that affect the protein product.

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Meiosis and Chromosomes

Inheritance of traits based on segregation of chromosomes.

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Mitosis vs. Meiosis

Table comparing cell division through mitosis and meiosis-process and cellular components involved.

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