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Biology Review of Genetics

Biology Review of Genetics. Study of heredity is called?. genetics. What does it mean to be homozygous?. To have the same type of genes (alleles). When a trait is co-dominant the heterozygous genotype shows ____________ traits for phenotype. To do problems use _____________ letters.

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Biology Review of Genetics

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  1. Biology Review of Genetics

  2. Study of heredity is called?

  3. genetics

  4. What does it mean to be homozygous?

  5. To have the same type of genes (alleles)

  6. When a trait is co-dominant the heterozygous genotype shows ____________ traits for phenotype. • To do problems use _____________ letters.

  7. BOTH (stripes/spots) • All capital letters

  8. When a trait is incomplete dominant the heterozygous genotype shows ____________ of traits for phenotype. • To do problems use _____________ letters.

  9. BLEND • All capital letters

  10. Sex – linked traits are on the _____ chromosomes, so the recessive trait occurs in what gender more often?

  11. X • Males • Be sure to use X and Y in problems !

  12. What are the chances of a mom with blood type O and a dad with blood type AB having a child with blood type O?

  13. 0% • P = ii x IAIB

  14. If you have blood type A-, who can you receive blood from? (list all possibilities)

  15. A- and O-

  16. Long hair is dominant over short hair, Tall is dominant over short, Curly hair is dominant over straight hair, Black is co-dominant with white. • The puppy’s chromosome from mom is on top • The puppy’s chromosome from dad is on bottom •  what length of hair will puppy have?

  17. Long (Ll)

  18. Long hair is dominant over short hair, Tall is dominant over short, Curly hair is dominant over straight hair, Black is co-dominant with white. • The puppy’s chromosome from mom is on top • The puppy’s chromosome from dad is on bottom •  What color of hair will puppy have?

  19. Black and white spots. (co-dominant)

  20. Long hair is dominant over short hair, Tall is dominant over short, Curly hair is dominant over straight hair, Black is co-dominant with white. • The puppy’s chromosome from mom is on top • The puppy’s chromosome from dad is on bottom •  what height was dad?

  21. Tall (T)

  22. Long hair is dominant over short hair, Tall is dominant over short, Curly hair is dominant over straight hair, Black is co-dominant with white. • The puppy’s chromosome from mom is on top • The puppy’s chromosome from dad is on bottom •  What height was the mom?

  23. Can’t tell because only see one chromosome and it is recessive

  24. What does it mean to be a carrier?

  25. To not have the trait but be able to pass it on – so genotype is heterozygous

  26. 1. In Mendel’s experiments, he crossed pea plants with green pods with pea plants with yellow pods. He found that all the offspring had green pea pods. • a. The plants used in the original cross are members of the ________________ generation. • b. The offspring of the cross make up the _____ filial generation or the ______ generation. • c. The pod color that is dominant is ________, while the recessive pod color is__________. • d. What would the genotypes be for the parents?

  27. 1. In Mendel’s experiments, he crossed pea plants with green pods with pea plants with yellow pods. He found that all the offspring had green pea pods. • a. The plants used in the original cross are members of the ____parental (P)__generation. • b. The offspring of the cross make up the _firstfilial generation or the ___F1___generation. • c. The pod color that is dominant is green, while the recessive pod color is_yellow__. • d. What would the genotypes be for the parents? • GG x gg

  28. 3. In rose, red flowers are incompletely dominant with white flowers. Heterozygous individuals produce pink flowers Cross a pink rose with a white one. No trait is dominant. What is the chance of the offspring being pink?

  29. 4. Stripes in geckos are controlled by a single gene with two alleles that are co-dominant. If a purple and yellow stripped gecko is crossed with a purple one, what will their offspring look like?

  30. Hemophilia is sex-linked. What are chances of a normal man and hemophiliac women having hemophiliac kids?

  31. 7. Cross a homozygous purple flower with a heterozygous purple flower. White is the recessive color. Show F1 probability.

  32. 5. A pea plant has smooth or wrinkled peas. The phenotype ratio is 50% smooth: 50% wrinkled. Find the genotype of the parents.

  33. 8. SpongeBob loves growing flowers for his pal Sandy! Her favorite flowers, Poofkins, are found in red, blue, and purple. Use the information provided and your knowledge of incomplete dominance: What would happen if SpongeBob crossed a Poofkin with red flowers with a Poofkin with purple flowers. What would the chance of Spongebob making a purple flower?

  34. 11. In peacocks, tail color is sex-linked. Blue is dominant over off white. Cross a blue tailed male to a carrier. Show F1 results.

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