Download Name Date Class ______ Review: Test 8 (Genetics and Meiosis

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Date ________________ Class ________
Review: Test 8 (Genetics and Meiosis)
1. What is a mutation?
2. If you get skin cancer from too much exposure to UV radiation, does this have an effect on
future offspring? Why or why not?
3. Purebred (true-breeding)4. Hybrid5. Allele6. Recessive7. Heterozygous8. Homozygous9. Phenotype10. Genotype11. Principle of dominance12. In Cookie Monsters, blue fur (B) is dominant over orange (b). A male heterozygous blue cookie
monster marries a female with orange fur. What percentage of the offspring will be orange?
13. In Guinea pigs, short hair is due to a dominant gene and long hair is due to a recessive gene.
Cross a homozygous, short-haired guinea pig with a long-haired guinea pig. What percentage of
the offspring will have long hair?
14. If the children (F1 generation) of the above cross mate with another heterozygous short-haired
guinea pig, what percentage of the offspring (F2 generation) will be short-haired?
15. In Dragons, blue skin color is dominant over red skin. If a homozygous blue dragon is crossed
with a red dragon, what percentage of the offspring will be blue?
16. When a red flower that is homozygous for color (RR) is crossed with a yellow flower that is
homozygous for color (rr), all of the F1 generation offspring are red. What are the expected
genotypes and phenotypes of flower color in the F2 generation?
17. Define and give an example of incomplete dominance.
18. Define and give an example of codominance.
19. Cross PPtt x PpTt. What are the gamete combinations? Now, do the punnett square.
20. Purple is dominant to white and tall is dominant to short. Do this dihybrid cross: PPTT x Pptt.
What are the genotypes and phenotypes of the offspring?
21. A pea plant with the genotype AaTt is crossed with a pea plant with the genotype aaTT. How
many different genotypes can be expressed in the offspring?
22. Fill in this dihybrid cross and find the genotypic and phenotypic ratios and percentages:
23. The diagram represents the chromosomes of a person with a genetic disorder caused by
nondisjunction, in which the chromosomes fail to separate properly. Which chromosome set
displays nondisjunction?
24. What is crossing-over? Draw an illustration of what happens to the chromosomes.
25. Who was Gregor Mendel?
26. What did Gregor Mendel use to study the inheritance of traits?
27. How are traits passed on?
28. What does the Punnett square show?
29. If you crossed purebred green plants with yellow plants, why would all the offspring be green?
30. How many times does the cell divide during meiosis?
31. How many chromosomes do the daughter cells have compared to the mother cells in meiosis?
32. Does meiosis make sex cells or body cells?
33. How many cells are produced during meiosis?
34. Know how to read a pedigree chart.
35. Know the differences between point mutation, deletion, insertion and frameshift.