Chapter 9: Patterns of Inheritance
Notes Guide p. 153-179
1. Why has the genetic science of dog breeding advanced since the turn of the year
2003?
2. Explain the contributions of Hippocrates and Aristotle to the beginnings of
genetics.
3. Background of Gregor Mendel
4. Describe the characteristics of Mendel’s test crosses:
Parents (P generation):
F1 Generation:
F2 Generation:
5. Define the terms:
Self-fertilize
Cross – Fertilization
True-Breeding
6. Describe Mendel’s Four Hypotheses:
7. What is a Punnett Square used for?
8. Define and give an and example for Phenotype:
9. Define and give an and example for Genotype:
Three Possible Gentopyes:
1.
2.
3.
10. Give an example of a dihybrid cross. Explain why Mendel’s dihybrid cross
supports the Law of Independent Assortment
11. Why do scientists use a testcross? Give an example.
12. What two rules of probability are used in the study of genetics? Describe them.
13. Draw the pedigree given on p. 161. Explain how pedigrees are used.
14. Describe and give specific examples for the following disorders:
*Recessive Disorders:
Cystic Fibrosis
Dominant Disorders:
Achondroplasia
Huntington’s Disease
15. Describe technologies used in the field of Genetic Testing:
a, Amniocentisis:
b. Chrionic Villi Sampling (CVS
c. Fetal Imaging
d. Newborn Screenins.
VARIATIONS TO MENDELS LAWS
*For each of the following describe the mode of inheritance and work out an
example using a Punnett Square
16. Incomplete Dominance
17. Multiple Alleles
18. Codominance
19. Pleiotropy
20. Polygenic Inheritance
The Chromosomal Basis of Inheritance
21. Define Linked Genes. Why do they tend to be inherited together?
22. Define Recombination Frequency: Give an example of how to calculate.
23. Explain the process of how scientists use cross-over data to map genes.
24. Explain what chromosomes determine sex in the following organisms:
Human
Grasshopper
Chicken
Bees
25. Define Sex-Linked gene. Give an example of a pedigree for a sex-linked
disorder.