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Explain this pedigree

Please Take Out The Following: Pencil Science Journal: Notes Portion Chapter 8 Homework Packet *If you have not taken the Chapter 8 Quiz from yesterday, SEE ME NOW !. Explain this pedigree. In sex-linked traits only females can be carriers.

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Explain this pedigree

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  1. Please Take Out The Following:PencilScience Journal: Notes PortionChapter 8 Homework Packet*If you have not taken the Chapter 8 Quiz from yesterday, SEE ME NOW!

  2. Explain this pedigree

  3. In sex-linked traits only females can be carriers.

  4. What disease do you think is displayed from this pedigree?

  5. Core & Honors Vocabulary What is an autosomal trait?

  6. Answer Autosomal: Pertaining to a chromosomethat is not a sex chromosome. People normally have 22 pairs of autosomes (44 autosomes) in each cell together with two sex chromosomes (X and Y in the male and XX in the female).

  7. Core & Honors Vocabulary Based on the pedigree below, is the disease sex linked (X-Linked), or autosomal? Why?

  8. Answer

  9. Core & Honors Vocabulary What best describes Huntington’s Disease? • Sex-Linked (X-Linked) Dominant • Autosomal Recessive • Sex-Linked (X-Linked) Recessive • Autosomal Dominant

  10. Answer HUNTINGTON’S DISEASE – A genetic disorder that is caused by an autosomal dominant allele.  Every one who inherits the allele develops Huntington’s disease and has a 50% chance of passing it on to offspring. Symptoms do not develop until a person is over 30 (late onset). Death is caused by the gradual breakdown of cells in the brain.

  11. Core & Honors Vocabulary When alleles for different characteristics are on separate chromosomes, they are distributed to gametes separately. This is known as: ________________________________________

  12. Answer When alleles for different characteristics are on separate chromosomes, they are distributed to gametes separately. This is known as: The Law of Independent Assortment *Mendel's Law of Independent Assortment - The alleles of the many different genes present in any given (diploid) organism segregate/assort from one another in a random fashion (see dihybrid cross)

  13. Vocabulary Which sets of gametes can come from an individual with the genotype: AaNn

  14. Answer AaNn

  15. Core & Honors Vocabulary What is it called where an allele of a gene separates from each other during meiosis?

  16. Answer What is it called where an allele of a gene separates from each other during meiosis? Mendel’s Law of Segregation

  17. Core & Honors Vocabulary When two alleles for a gene cause a blended phenotype, this is called: ___________________

  18. Answer When two alleles for a gene cause a blended phenotype, this is called: Incomplete Dominance

  19. Vocabulary When one allele/genes affects multiple traits on the phenotype, it is called: ____________________

  20. Answer When one allele/genes affects multiple traits on the phenotype, it is called: Pleiotropy Pleiotropy – the ability of one gene to affect an organism in many ways.

  21. Core & Honors Vocabulary When multiple pairs of genes determine a trait, it is called: __________________________________

  22. Answer When multiple pairs of genes determine a trait, it is called: Polygenic Inheritance

  23. Core & Honors Vocabulary When two different alleles for a trait are both expressed, it is called: ________________

  24. Answer When two different alleles for a trait are both expressed, it is called: codominance

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