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Genetics Test Review

Genetics Test Review. Chapter 11. Match the Scientists. 1. Mendel A. recombination 2. Morgan helps make map 3. Sturtevant B. alleles segregate C. some genes linked. Match the Scientists.

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Genetics Test Review

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  1. Genetics Test Review Chapter 11

  2. Match the Scientists • 1. Mendel A. recombination • 2. Morgan helps make map • 3. Sturtevant B. alleles segregate • C. some genes linked

  3. Match the Scientists • 1. Mendel B. alleles segregate • 2. Morgan C. genes linked 3. Sturtevant A. recombination • helps make map

  4. 4. What is fertilization? • Process of sexual reproduction • Joining egg + sperm • Joining egg and pollen

  5. What is true-breeding and hybrid? • 5. True-breeding = E. offspring are identical to parents • 6. Hybrid = D. offspring are of parents of different traits

  6. 7. Genes are____: • F. the location on a chromosome for a trait

  7. PUNNETT PRACTICE • p.3 Dihybrid Cross • What are the parental genotypes? • Heterozygous running, heterozygous black mouse • Homozygous running, homozygous black mouse

  8. PUNNETT PRACTICE • p.3 Dihybrid Cross • What are the parental genotypes? • Heterozygous running, heterozygous black mouse RrBb • Homozygous running, homozygous black mouse RRBB

  9. PUNNETT PRACTICE • Dihybrid Cross • How many boxes to you need for a dihybrid cross? • ANSWER: • 16

  10. PUNNETT PRACTICE • Show how you would place the parental alleles on each side of the Punnett Squares:

  11. RB Rb rB rb RB RB RB RB

  12. NOW FILL IN THE BOXES AND • WHAT IS THE PHENOTYPIC RATIO?

  13. 100% running black RB Rb rB rb RB RB RB RB

  14. 8. Gametes are: • A. body cells • B. sex cells • C. somatic cells • D. skin cells • ANSWER: sex cells B

  15. 9. The likelihood that a particular event will occur is: • A. hybrid • B. offspring • C. probability • D. recombination • ANSWER: C probability

  16. 10. The wild type is… • A. dominant trait • B. recessive trait • C. most common trait • ANSWER: C

  17. 11. homologous • D. male + corresponding female set of chromosomes

  18. GO TO PUNNETT PRACTICE • On your dry erase board. • Do #4 on page 2. • Cross two plants that are heterozygous for green pods.

  19. #4 Answer Genotypic ratio: GG:Gg:gg 1: 2: 1 Phenotypic ratio: Green:yellow 3:1 G g GG G g

  20. 12. Haploid and 13. Diploid • 13. C. one set of chromosomes N in humans 23 14. B. two sets of homologous chromosomes 2N in humans 46

  21. 14. What is a tetrad? • A. 4 homologous chromosomes

  22. MULTIPLE ALLELE TRAITS IN CHICKENS • Question #1:On the cross pictured, what must be the genotypes of the two parents for the outcome to always be a buttercup offspring? • ANSWER: • rrPP X RRpp

  23. Did you set it up right? RP Rp rP rp RP Rp rP rp

  24. 9:3:3:1 RP Rp rP rp RP Rp rP rp

  25. 15. Crossing-over • F. homologous chromosomes exchange segments

  26. 16. What is a chiasma? • A. when 4 chromosomes come together • B. when a cell divides into 4 cells • C. when a cell splits • D. making poopie • E. is the point of crossing over of the two inner homologous chromosomes • ANSWER: E

  27. 17. Contrast Mitosis and Meiosis • Mitosis: • starts with 2N parent • Daughter cells are 2N • Daughter cells identical • Makes somatic cells • Ends with 2 cells • 1 division

  28. 17. Contrast Mitosis and Meiosis • Meiosis: • starts with 2N parent • Daughter cells are N • Daughter cells different • Makes sex cells • Ends with 4 cells • 2 divisions

  29. 18. If you had a tall plant, how can you tell if it is TT or Tt? T t • Cross it with tt • (a test cross) t t T T t t

  30. 18. If you had a tall plant, how can you tell if it is TT or Tt? T t • Cross it with tt t t T T t t

  31. 19. Spongebob SsYy marries and mates Spongebetty ssYy Y=yellow y=blueS=square s=round

  32. 19. Spongebob SsYy marries and mates Spongebetty ssYy Y=yellow y=blueS=square s=round

  33. 19. SsYy X ssYy SY Sy sY sy sY sy sY sy

  34. 19. SsYy X ssYy SY Sy sY sy sY sy sY sy

  35. 6 square yellow 6 round yellow2 square blue 2 round blue SY Sy sY sy sY sy sY sy

  36. 20. Flower Parts

  37. EXTRA: Male Flower Parts? • Stamen pistil stigma anther • ANSWER: stamen anther

  38. 21. Hetero or Homo zygous • _____HH _____hh _____Hh • ANSWER: • Homozygous Heterozygous • HH hh Hh

  39. EXTRA: Recessive? • T t H h • ANSWER: t h

  40. EXTRA: Dominant? • T t H h • ANSWER: T H

  41. CHECK YOUR SKILLS: Go to Punnett Practice #7 • Genotypic Ratio? • Phenotypic Ratio?

  42. Nn x nn • N n • Genotypic: • Nn:nn • 2 : 2 • Phenotypic • Smooth;const. • 2 : 2 Nn nn n nn Nn n

  43. CHECK YOUR SKILLS: BbFf x bbff • How many boxes do you need?16 • How do you separate each parent?BF Bf bF bf • bf bf bf bf

  44. BF Bf bF bf bf bf bf bf

  45. Genotypic Ratio • BbFf : Bbff : bbFf : bbff • 4 4 4 4 • Phenotypic Ratio • Black fat : black thin : white fat : white thin • 4 4 4 4

  46. CHECK YOUR SKILLS: RR x RW incomplete dominance • R R R W

  47. CHECK YOUR ANSWER: RR x RW incomplete dominance • R R Genotypic RR : RW 2 2 Phenotypic Red : Pink 2 2 R W RR RR RW RW

  48. #22 • Black rooster and white chicken form black and white spotted chicks • ANSWER: codominance

  49. #23 • The color of the skin is determined by six different locations on genes • ANSWER: polygenic trait

  50. #24 • A red flower is crossed with a white flower to make pink offspring. • ANSWER: incomplete dominance

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