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Genetics Review!

Genetics Review!. Question 1. What is the genetic material of all organisms made up of 2 twisted strands of sugar-phosphate and nitrogen bases?. 1. DNA. Question 2. What is a section of DNA located on a chromosome /controls traits?. 2. Gene. Question 3.

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Genetics Review!

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  1. Genetics Review!

  2. Question 1 What is the genetic material of all organisms made up of 2 twisted strands of sugar-phosphate and nitrogen bases?

  3. 1 DNA

  4. Question 2 What is a section of DNA located on a chromosome /controls traits?

  5. 2 Gene

  6. Question 3 What is the passing of traits from parents to offspring?

  7. 3 Heredity

  8. Question 4 Who is the father of genetics?

  9. 4 Mendel

  10. Question 5 An organism receives how many genes for each trait and from whom?

  11. 5 • 2 • One from each parent

  12. Question 6 What is the gene that if present, its trait will always show up in the individual? (The allele is represented by a capital letter.)

  13. 6 • Dominant • RR or Rr

  14. Question 7 What is the weaker gene that may be hidden and not show up in the trait of an individual unless there are two of them? (The allele is represented by a lowercase letter.)

  15. 7 • Recessive • rr

  16. Question 8 If an organism has 2 dominant or 2 recessive genes it is said to be what?

  17. 8 Pure bred or Pure BB bb

  18. If an organism has 2 different genes it is said to be what? Question 9

  19. 9 A Hybrid (Bb) • Think of a hybrid car- runs on 2 different sources of energy

  20. Another hybrid

  21. Question 10 If an organism has 2 dominant or 2 recessive alleles it is said to be what?

  22. 10 Homozygous

  23. Question 11 Which is homozygous dominant, which is homozygous recessive, and heterozygous? RR Rrrr

  24. 11 Homozygous dominant- RR Homozygous recessive- rr Heterozygous- Rr

  25. Question 12 If an organism has 2 different alleles it is said to be what?

  26. 12 Heterozygous

  27. Question 13 Draw a Punnett Square - Make mom Pure TALL - Make dad SHORT Genotypes and Phenotypes of kids

  28. 13 t t T Genotype- Tt Phenotype- 100% tall T

  29. Question 14 Using the letter “H”: Draw a Punnett Square Cross two HYBRID parents

  30. 14 H h H h

  31. Question 15 Looking at your Punnett Square: What is the probability of having offspring that are purebred recessive?

  32. 15 1:4 or 25%

  33. Question 16 What is the word used that means: a single letter that is written that represents a dominant or recessivetrait passed from one parent

  34. 16 Allele

  35. Question 17 Write a genotype that says the offspring is purebred recessive

  36. 17 aa bb cc ddee ff gg

  37. Question 18 Write a genotype that says the offspring is purebred dominant

  38. 18 AA BB CC DD EE FF GG

  39. Question 19 Write a genotype that says the offspring is a hybrid

  40. 19 AaDdGgNnRr

  41. Question 20 Set up and solve a punnett square from this information: Brown hair is dominant over blonde hair Brad and Angelina are expecting children very soon. Brad is pure for brown hair. Surprisingly, Angelina is also pure, but for blonde hair. How many children will be homozygous dominant? Homozygous recessive? Heterozygous?

  42. 20 B B b b Homozygous Dominant: none Homozygous Recessive: none Heterozygous: 4:4 or 100%

  43. Question 21 It is a word on the word wall… Can be passed down by one of your parents It is the allele that covers up the weaker allele Ex: tongue roller, widow’s peak

  44. 23 dominant

  45. Question 24 Word on the word wall: Each parent provides one Comes in pairs Pair can be dominant, recessive, or both Ex: a or A

  46. allele

  47. Question 25 Word on word wall: Illustrates probability Genetic cross Shows allele combinations

  48. Punnett square

  49. Question 26 Word on word wall: Branch of science Study of heredity Explains how traits are passed down from parents

  50. Genetics

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