Name________________________________
Genetics Test Review Sheet
Must be completed before the test!!!!!! SHOW YOUR WORK WITH PUNNETT SQUARES!!
1. Who was Gregor Mendel? __________________________________________________________________________
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2. Explain dominance and recessive_____________________________________________________________________
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3. Explain the Law of Segregation_______________________________________________________________________
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4. Explain the Law of Independent Assortment____________________________________________________________
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5. Define incomplete dominance. Give an example using flowers of incomplete dominance.________________________
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6. What are multiple alleles? Give an example of a trait determined by multiple alleles.___________________________
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7. What are sex-linked traits? Give two examples of disorders that are caused by sex linked traits.
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8. What is the chromosome combination for a female? Chromosome combination for a male?_____________________
9. What is the percent chance that a couple will have a girl? What is the percent chance that a couple will have a boy?
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10. What is the percent chance that an egg will carry an X chromosome? What is the percent chance that a sperm will
carry an X chromosome? What about a Y chromosome for both?_____________________________________________
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11. Which gender shows more sex-linked disorders?_______________________________________________________
12. Define polygenic traits. Give two examples of traits that are polygenic._____________________________________
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13. While a gene can have multiple alleles, how many of the alleles can the organism receive? ______________
14. Four-o’clock flowers show incomplete dominance for flower color, two pink flowers (RW) are crossed what are the
possible genotypes and phenotypes of their offspring. SHOW YOUR WORK!
15. Justin Bieber is heterozygous for blood type
B and Selene Gomez is type AB. Predict the
possible blood types of their future babies?
SHOW YOUR WORK!
16. A man who is homozygous for blood type A marries a woman with blood type O. What could the blood type of their
offspring be? SHOW YOUR WORK!
17. Black and white speckled chickens show codominance for feather color. If a chicken with white feathers is crossed
with a chicken with black feather, what percentage of their offspring will be black and white speckled? What if you
crossed two black and white speckled chickens, what would the percentage be of them having black and white speckled
offspring? SHOW YOUR WORK
18. In cattle, roan coat color (red and white hairs) occurs in the heterozygous offspring of red haired cows and white
haired cows (both pure). What two cows would you have to breed to produce offspring with a phenotypic ratios of
2red : 2roan? What two cows would you have to breed to produce offspring with the ratio 1red:2roan:1white? What
two cows would you have to breed to produce offspring with the ratio 2roan:2white? SHOW YOUR WORK
19. Explain the significance of meiosis to reproduction.__________________________________________________
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20. Compare and contrast mitosis to meiosis
mitosis
meiosis