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Chapter 11 Chromosome “issues”

Chapter 11 Chromosome “issues”. Genetic Disorders :. Recessive (t) Caused by receiving 2 “bad” recessive alleles Ex. T= normal t = albino tt = albino disorder. Dominant (T) Caused by receiving at least 1 “bad” dominant allele Ex. T = dwarf t = normal Tt = dwarf disorder.

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Chapter 11 Chromosome “issues”

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  1. Chapter 11Chromosome “issues”

  2. Genetic Disorders: Recessive (t) • Caused by receiving 2 “bad” recessive alleles • Ex. T= normal t = albino tt = albino disorder Dominant (T) • Caused by receiving at least 1 “bad” dominant allele • Ex. T = dwarf t = normal Tt = dwarf disorder

  3. Pedigree • Is a diagram that Traces the inheritance Of a particular trait Through several Generations.

  4. Sex-linked Traits pg 307 • Occur on the X chromosome at number 23. • More frequent in males • Ex. Colorblindness

  5. 11.2 Complex Patterns of inheritance • Incomplete Dominance = the heterozygous genotype creates a new phenotype! • Codominance = both alleles are dominant and therefore a combined phenotype is shown

  6. Incomplete dominance pg. 302 • R = red flowers • r = white flowers • RR – red • rr - white • Rr = pink

  7. Codominance pg. 302 • Both alleles show dominance! Ex – blood types Type AB shows the A allele as well as the B allele!

  8. Polygenic Traits pg. 309 • Traits such as height, skin color, that are determined by several Genes, not just two alleles!

  9. karyotype • Picture of all of your 46 chromosomes - paired!

  10. Law of segregation pg. 279 • = “states that two alleles for each trait separate during meiosis. • Upon fertilization (zygote) they will reunite!

  11. Law of Independent Assortmentpage 280 • “states that alleles randomly distribute themselves during meiosis. • Genes on separate chromosomes will switch. • This allows for more variation!

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