1 / 16

Probability and Pedigree Practice Problems

Probability and Pedigree Practice Problems. Pick a card. Today. Practice probability problems Practice will help in doing these types of questions. Any problems you do not have time to do, try doing later. Practice. 1. Work on the probability problems on pages 1-4 and 1-5 of the lab manual

dwayne
Download Presentation

Probability and Pedigree Practice Problems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Probability and Pedigree Practice Problems Pick a card

  2. Today • Practice probability problems • Practice will help in doing these types of questions. • Any problems you do not have time to do, try doing later.

  3. Practice • 1. Work on the probability problems on pages 1-4 and 1-5 of the lab manual • 2. Pedigrees and probability problems 1-28 and 1-30. These you may need to complete at home. • Please refer to Dr. Colavito’s homepage for solutions.

  4. Begin with page 1-4 • 1. • A) Probability of rolling a “5”= 1/6 • B) Probability of rolling an even number: 1/6 + 1/6 + 1/6 = 1/2

  5. Problem 1 continued • 1c) 1/6 x 1/6 x1/6 = 1/216 • 1d) 6x(1/216)=1/36 • 1e) 1/216 x 6 = 1/36 • 1f) 1 (any number) x 5/6 x 4/6 = 20/36= 5/9

  6. Problem 2 • First identify the probabilities of selecting various colors: • Jar 1: P (y)= 1/5 P (G) = 4/5 • Jar 2 :P (O) = 2/5 P(G) 3/5 • Jar 3 :P (P) 1/10 P(G) 9/10

  7. Problem 2 • A. 1/5 x 2/5 x 1/10 = 2/250 = 1/125 • B. 4/5 x 2/5 x 9/10 = 72/250 • C. 1-(probability of no green skittles, see part A.)= 1-1/125=124/125

  8. Problem 2 • D. calculate all possible combinations for each container: • (4/5 x 3/5 x 1/10) + (4/5 x 2/5 x 9/10) + 1/5 x 3/5 x 9/10) = 111/250

  9. Problem 2 • E. (2/5 x 1/10 x 4/5) = 8/250= 4/125

  10. Problem 3 Autosomal Dominant • A. ¾ • B. 4!/3!1! (1/4)3 (3/4)1= 3/64 • C. ¼ x ¾ x/ ¾ = 9/64 • D. 1-(probability that all will have straight little fingers)= 1-(1/4) 3= 63/64

  11. Problem 4: Autosomal Recessive • A. 2/3 • B. 2/3 • Keep in mind the parents of Jessica and Jerry must be heterozygous for in order to have a sibling that has CF.

  12. Problem 4 • C. 2/3 x 2/3 x 1/4 = 1/9 • Remember to refer to your Punnett square and you will see that with heterozygous parents there is ¼ chance of cc.

  13. Problem 4 • D. 3!/2!1! (1/9)2 (8/9)1 = 8/243 • E. 8/9 x 1/9 x 8/9 = 64/729

  14. Problem 5: X linked recessive • ½ that Polly has the “d” allele • ½ x ¼ =1/8 • ½ x 3/8 x 1/8 = 3/128 • 5!/2!3! (1/8)2 (7/8) 3 = 3430/32768 =0.105

  15. Pedigrees (page 1-26) • A. autosomal dominant • B. X linked dominant • C. X linked recessive • D. autosomal recessive • E. X-linked dominant • F. Autosomal recessive • G. Autosomal Dominant • H. X-linked recessive

  16. Answers • Check Dr. Colavito’s homepage “study guide” to check your answers.

More Related