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Mini-repaso

Explore genetic traits inheritance scenarios and calculate probabilities using Punnett squares. Includes examples of dominant and recessive alleles. Chi-square analysis included.

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Mini-repaso

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  1. Mini-repaso

  2. 1 One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair. A) 100% B) 25% C) 75% D) 50% 2 One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having short hair. A) 25% B) 50% C) 75% D) 100%

  3. 3. About 70% of Americans perceive a bitter taste from the chemical phenylthiocarbamide (PTC). The ability to taste this chemical results from a dominant allele (T) and not being able to taste PTC is the result of having two recessive alleles (t). Albinism is also a single locus trait with normal pigment being dominant (A) and the lack of pigment being recessive (a). A normally pigmented woman who cannot taste PTC has a father who is an albino taster. She marries a homozygous, normally pigmented man who is a taster but who has a mother that does not taste PTC. What percentage of the children will be non-tasters of PTC? What percentage of the children will be albinos?

  4. 4. Un marido acusa a su esposa de infidelidad y pide la custodia de sus dos primeros hijos, mientras que rechaza al tercero afirmando que no es suyo. El primer y el segundo hijo son del grupo sanguíneo B, y el tercero del grupo sanguíneo O. El marido es del grupo sanguíneo B, y la mujer, también del grupo B ¿Crees que la acusación del hombre esta fundada? Razona la respuesta con cuadro Punnett/.

  5. Chi-square

  6. Genetica, medicina y sociedad

  7. Enfermedades de origen genetico • Alteraciones cromosómicas

  8. Enfermedades de origen genetico • Alteraciones cromosómicas • cariotipo

  9. Enfermedades de origen genetico • Alteraciones cromosómicas • Enfermedades monogenicas

  10. Enfermedades monogenicas • Sustitución de una base por otra • Inserciones o deleciones de uno o mas bases • Repetición de un triplete especifico

  11. Unos ejemplos • Tay-Sachs

  12. Unos ejemplos • Tay-Sachs • PKU (fenilcetonuria)

  13. Unos ejemplos • Tay-Sachs • PKU (fenilcetonuria) • Huntington • La destrucción de células cerebrales y lleva a la demencia y muerte

  14. Unos ejemplos • Huntington

  15. Enfermedades ligadas al cromosoma X • Color • hemofilia

  16. Enfermedades ligadas al cromosoma X • Color • hemofilia

  17. Enfermedades multifactorales • Cancer

  18. Diagnosticos y Terapia

  19. Proyecto Genoma Humano

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