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Warm up

Warm up. Complete the punnet square for a Tall pea plant. T= tall t=short. The parents are Tt x tt What are the genotypes and phenotypes? What are the genotype and phenotype ratios? Warm ups & Test corrections are due. You have 5 min!. 1:31. 1:59. 1:58. 1:57. 1:56. 1:55. 1:54.

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Warm up

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  1. Warm up • Complete the punnet square for a Tall pea plant. T= tall t=short. • The parents are Tt x tt • What are the genotypes and phenotypes? • What are the genotype and phenotype ratios? • Warm ups & Test corrections are due. You have 5 min! 1:31 1:59 1:58 1:57 1:56 1:55 1:54 1:53 1:52 1:51 1:50 1:49 1:48 1:47 2:00 1:45 1:46 1:33 1:34 1:35 1:37 1:38 1:36 1:40 1:41 1:42 1:43 1:39 1:32 1:01 1:44 1:29 1:30 1:27 1:26 1:25 1:24 1:23 1:22 1:21 1:20 1:19 1:18 1:17 1:16 1:15 1:28 1:13 1:14 1:00 1:02 1:03 1:05 1:06 1:04 1:08 1:09 1:10 1:11 1:12 1:07 0:52 0:49 0:50 0:51 0:53 0:59 0:55 0:56 0:57 0:58 0:01 0:54 0:48 0:41 0:46 0:44 0:43 0:42 0:40 0:39 0:38 0:37 0:36 0:35 0:34 0:32 0:33 0:47 0:45 0:14 0:15 0:31 0:20 0:17 0:18 0:19 0:21 0:27 0:23 0:24 0:25 0:26 0:28 0:22 0:16 0:10 0:13 0:12 0:11 0:09 0:08 0:07 0:06 0:05 0:04 0:03 0:29 0:02 0:30 End

  2. Types of Inheritances Pp 237, 242-245

  3. Single gene traits • controlled by only one gene - complete, incomplete, and codominant EX. Huntington Disease (D/d), Sickle Cell Anemia (N/S) , Cystic Fibrosis (R/r)

  4. Polygenic traits • controlled by additive effects of two or more genes EX. Skin color (controlled by 3-6 genes), eye color - each gene is responsible for adding pigment

  5. Multiple allele trait • controlled by more than two alleles in one gene • Still only inherit one copy from each parent for a total of two alleles but have a few to combine EX. Blood type: IAIA, IAi , IBIB , IBi,IAIB, ii

  6. Blood Typing

  7. Trait controlled by multiple alleles, with two that are codominant and one “null” Dominant Allele: I Recessive Allele: i 2 Dominant Alleles: 1 Recessive Allele: A: IA B:IB O= i

  8. Trait controlled by multiple alleles, with two that are codominant and one “null”

  9. Someone with AB blood can receive blood from A, B, AB, and O because it doesn’t have antibodies to clump cells. However it can only be giving to AB because all other blood types have antibodies that can cause clumping with the AB cell. • Use serums that contain these antibodies to test blood type

  10. Sex linked traits • Gender determined by XX or XY • Disorder/trait found on the “X” chromosome • seen more in men than women EX. (color blindness and hemophilia) • “Y” has to come from father • “XR or Xr” vs just “R or r”

  11. Possible genotypes and phenotypes: XR XR = normal vision XR Xr = normal vision Xr Xr = color blind XR Y = normal vision Xr Y = color blind XR Xr XRY XrY XR Y XRXR XRXr

  12. Sex-influenced trait • Usually autosomal • Specific hormones influence trait/genotype EX. Baldness: testosterone influences BB

  13. Rh factor • people who are Rh+ have Rh antigens the red blood cell's surface • A person with Rh- blood has Rh antibodies in the blood plasma that react with the Rh+ blood antigens

  14. Testing Blood Type • Use anti-A serum and anti-B serum • If you use anti-A serum and it clumps then it has A antigens (proteins), if you use anti-B serum and it clumps then it has B antigens • No clumping = no antigens What blood type would this be?

  15. Homework • Read 237 -242 • Problems p 240 #1-6 • P 251 # 1, 4, 5, 6

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