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Biology – The Continuity of Life

Biology – The Continuity of Life. Objective 2 Identify human genetic conditions using a karyotype. Karyotype. Definition: A photograph of all of a person’s chromosomes, arranged in homologous pairs, by size When is it used?

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Biology – The Continuity of Life

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  1. Biology – The Continuity of Life • Objective 2 Identify human genetic conditions using a karyotype.

  2. Karyotype • Definition: • A photograph of all of a person’s chromosomes, arranged in homologous pairs, by size • When is it used? • To confirm the appearance of extra, missing, or damaged chromosomes (to diagnose a disease)

  3. Karyotype • How is it made… • Cell division is stopped during metaphase • The chromosomes are stained • The cell is broken open by dropping it onto a glass slide • The chromosomes are photographed, enlarged, and arranged

  4. A normal karyotype for a human woman

  5. A normal male karyotype

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