1. 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!

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?

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

7. Answer Autosomal: Pertaining to a chromosome that is not a sex chromosome.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).malefemale

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

9. Answer

10. Core & Honors Vocabulary What best describes Huntington’s Disease? A)Sex-Linked (X-Linked) Dominant B)Autosomal Recessive C)Sex-Linked (X-Linked) Recessive D)Autosomal Dominant

11. 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.

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

13. 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)Law of Independent Assortment

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

15. Answer AaNn

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

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

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

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

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

21. 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.

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

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

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

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