SQ3R – Chapter 14 & 15
Chapter 14 (Genetics) should already be familiar to you. Skim through the chapter and answer the
questions below for your SQ3R.
S = Skim
Q = answer Questions
R = Read sections that are confusing
R = Review your responses when done
R = Review you SQ3R on another day
Chapter 14
Mendel’s Experimental, Quantitative Approach
1. What kind of organisms must be crossed for hybridization to occur?
2. Identify the three types of generations in breeding and what they each stand for.
The Law of Segregation
3. What was surprising about the F2 generation of an initial true breeding P generation? What kind
of inheritance pattern did this show?
Mendel’s Model
4. What are alleles?
5. How many alleles does an individual get for each trait? Where do these alleles come from?
6. What is the difference between dominant and recessive alleles and how do they determine an
organism’s appearance?
7. What is the law of segregation?
8. What information do Punnett squares convey?
Useful Genetic Vocabulary
9. Differentiate between homozygous and heterozygous.
10. Differentiate between genotype and phenotype.
The Test Cross
11. Describe a situation in which using a test cross may be helpful.
The Law of Independent Assortment
12. When would a monohybrid cross be used? When would a dihybrid cross be used?
13. How does the law of independent assortment relate to the experiment in Figure 14.8?
Degrees of Dominance
14. Describe a scenario that exhibits complete dominance.
15. Describe a scenario that exhibits incomplete dominance.
16. Describe a scenario that exhibits codominance.
The Relationship between Dominance and Phenotype
17. How is the genetic disease Tay-Sachs inherited?
Multiple Alleles
18. Why is blood typing said to be inherited with multiple alleles?
Polygenic Inheritance
19. What is polygenic inheritance? Give an example.
The Behavior of Recessive Alleles
20. What is a carrier?
Cystic Fibrosis
21. How is cystic fibrosis inherited?
Sickle Cell Disease
22. Describe the inheritance of sickle cell disease and its evolutionary implications.
Huntington’s Disease
23. Describe the inheritance pattern of Huntington’s Disease.
Chapter 15
Mendelian Inheritance has its physical basis in the behavior of chromosomes
24. What does the chromosome theory of inheritance suggest?
Morgan’s Choice of Experimental Organism
25. What is a wild type?
Correlating Behavior of a Gene’s Alleles with Behavior of a Chromosome Pair
26. What did Morgan’s experiments with flies reveal about the chromosome theory of inheritance?
The Chromosomal Basis of Sex
27. What is the difference between an X-linked gene and sex-linked genes?
Inheritance of X-Linked Genes
28. Why are males more likely to inherit X-linked disorders than females?
X Inactivation in Female Mammals
29. How does X-inactivation work? Describe a scenario involving x-inactivation.
How Linkage affects inheritance
30. What are linked genes?
31. How does linkage affect inheritance?
32. What is genetic recombination?
Recombination of Linked Genes
33. How is crossing over related to gene linkage?
New Combinations of Alleles
34. How does recombination relate to evolution of a species?