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Chapter 9 HW Patterns of Inheritance
Due Wed. 1/14/ 2009
1. Outline- Chapter 9- not typed, written in ink.
2. Vocabulary- on a separate sheet of paper number terms and write definitions. When
there are 2 words (vs.) be sure to distinguish differences between them. Indent on the
line below and write an example or sentence or draw a picture of the vocabulary.
1. allele
2. gene
3. recessive
4. dominant
5. genotype
6. phenotype
7. heterozygous
8. homozygous
9. hybrid
10. test cross
11. polygenic inheritance
12. independent assortment
13. sex linked
14. linked genes
15. genetic recombination
16. mutation
17. incompelete domiance vs. codominance
18 segregation
19. pedigree
20. pleiotrophy
3. Review questions- number each one and answer on a separate sheet of paper, you do
not need to rewrite the questions.
1. Explain Mendel’s law of segregation
2. How did the monohybrid crosses performed by Mendel refute the blending
concept of inheritance?
3. How id a monohybrid testcross used today?
4. Explain Mendel’s law of independent assortment/
5. How did the F2 results from a dihydrid cross performed by Mendel illustrate the
law of independent assortment.
6. Why does a 9:3:3:1 pattern suggest in a dihybrid cross
7. Describe the difference in inheritance patterns for linked genes and explain how
recombination can be used to estimate gene distances.
8. How would an F2 result from a dihybrid cross of linked genes (assume only 1%
difference in locus position) differ from those obtained by unlinked genes.
9. Describe how sex is inherited in humans and identify the pattern of inheritance
observed for sex-linked genes.
10. What is the chromosomal basis of inheritance. List the ways in which genes
and chromosomes behave similarly during meiosis and fertilization.