Chapter 5 – Heredity
Name_______________________________________________
Section 1 – Mendel and His Peas – p. 114-119
1. What is heredity?
2. What did Mendel discover about traits from generation to generation?
3. Why were garden peas a good choice for doing genetics experiments?
4. What is the difference between self-pollination and cross-pollination?
5. If a characteristic is eye color, what could the trait be?
6. ________________ generation is the original true breeders , then comes ________________
generation, then _________________ generation.
7. What did Mendel discover about every characteristic, in the second generation?
8. Which trait is stronger, dominant or recessive?
9. (don’t write this question)Figure out the ratio of dominant to recessive traits for one of the traits in
the chart. Record the characteristic and the ratio.
Section 2 – Traits and Inheritance p. 120-125
10. What do we call the instructions for an inherited trait?
11. If your mom gives you a gene for brown hair and your dad gives you a gene for blond hair, those are
the _________ for the hair color gene.
12. What is the difference between genotype and phenotype?
13. (don’t copy question, label genotypes)Give an example of a homozygous genotype and a
heterozygous genotype.
14. (don’t copy question) Draw and complete Punnett squares for:
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homozygous dominant parent and a homozygous recessive parent
2 heterozygous parents
Homozygous dominant parent and heterozygous parent
Homozygous recessive parent and heterozygous parent
15. Do not write this question. Go back to each Punnett Square and tell the phenotypes for each
offspring (for example, 3 Ds and 1 d, or all G)
16. What is incomplete dominance?
Section 3 – Meiosis p. 126-132
17. Which human cells go through meiosis?
18. What are homologous chromosomes?
19. In meiosis, how many times do the chromosomes copy? How many times does the nucleus divide?
20. When meiosis is complete, what is the result?
21. Explain the difference in sex chromosomes in males and females.
22. Where are the genes for sex-linked disorders carried? Why are males more likely to have these
disorders?
23. Why would someone want to get genetic counseling?
24. What type of selective breeding might a farmer use?