Name ______2015

Chapter 11: Mendel and the Gene Idea Guided Reading

Section 11.1

  1. Define the following terms:
  2. Character
  1. Trait
  1. True-breeding
  1. Hybridization
  1. P generation
  1. F1 generation
  1. F2 generation
  1. Discuss Mendel’s data for the F1 and F2 generations
  1. State and then discuss Mendel’s 4 “models” or laws.
  1. Define the following terms.
  2. Alleles
  1. Punnett Square
  1. Homozygous
  1. Heterozygous
  1. Phenotype (& give an example)
  1. Genotype (& give an example)
  1. Give an example of a monohybrid cross and a dihybrid cross.
  1. What is the Law of Independent Assortment and how does this “law” relate to meiosis?
  1. Write your own example for the Law of Independent Assortment.

Section 11.2

  1. Define and then explain in your own words both the Multiplication rule and the Addition rule.
  1. Using the Multiplication and Addition rules, figure out the following problems:

In pea plants, Yellow seed coats are dominant to green seed coats and Green pod color is dominant to yellow pod color.

____ = Yellow seed coat_____ = Green Pods

____ = Green seed coat_____ = Yellow pods

If the parent plants are YYGg x YyGg, what is the likelihood of the following? Do your Punnett Square below:

  1. Probability of getting a YYGG? ______
  2. Probability of getting a YyGg? ______
  3. Probability of getting a YyGG? ______
  4. Probability of getting a Yygg? ______
  5. Probability of getting a YyGG or a YyGg? ______
  6. Probability of getting a YYGg or a YyGg? ______
  7. Probability of getting a YyGg and a YYGG? ______
  8. Probability of getting a YyGg and a YyGg? ______
  1. Using the same parents from above but now add on another trait. This time, we will add the dominant inflated pod shape to the constricted pod shape. The P generation will be:

YyGgIi x YYGgii

What is the probability of getting offspring that are:

  1. YyGgIi? ______
  2. YYggIi? ______
  3. YyGgii? ______
  4. YYGgIi? ______
  5. Yyggii? ______

Section 11.3

  1. Contrast complete dominance to codominance and incomplete dominance.
  1. Why do we need to look at genetics at the organismal, biochemical, and molecular level? Use Tay-Sachs as an example.
  1. Does having a dominant allele mean that it will be found in greater frequency in the population? Give an example of when it does not.
  1. What are multiple alleles? Give an example
  1. What would be your “clue” that a character would have polygenic inheritance pattern?

Section 11.4

  1. What is a pedigree and how does it help in our understanding of genetics?
  1. Describe and discuss the genetics of the following inherited disorders. Identify the pattern of inheritance involved, if dominance/recessive, which triat is dominant.
  2. Cystic Fibrosis
  1. Sickle cell disease (& what this gives a resistance to)
  1. Achondroplasia
  1. Huntington’s disease
  1. Tay-Sachs’ disease

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