Genetics with a Smile Task Card

Transcription

1 Genetics with a Smile Task Card Part A: Smiley Face Traits: Record your data in DATA TABLE A 1. Obtain two coins. The penny represents the female (Penny s) genotype and the nickel represents the male (Nick s) genotype. 2. Holding both coins in your hand, flip them to determine which allele each parent will pass to Baby Smiley. Heads = Dominant Trait Tails = Recessive Trait A. On the table below, circle the allele Penny passed on to Baby Smiley in the column labeled FEMALE and the allele Nick passed to Baby Smiley under the column labeled MALE. B. Based on the outcome of the coin toss, write the genotype of Baby Smiley in the GENOTYPE column. C. Based on Baby Smiley s genotype, use the provided Smiley Face Traits to determine Baby Smiley s phenotype for each trait. Record the data in the PHENOTYPE column. Part B: Is Baby Smiley a boy or a girl? To determine the sex of Baby Smiley, flip the coin for the male parent. Add the gender to the Data Table B. Heads = Y (male) Tails = X (female) Part C: Create Baby Smiley! Obtain a Face Shape based on your data. Using Data tables A and B, create an accurate representation of your Baby Smiley based on the phenotype you created. Once you have created Baby Smiley, give him/ her a name and write the name on the line. Sex: To determine the sex, flip a coin for the male parent. Heads = Y and tails = X

2 = % 30pts Genetics with a Smile Name: Date: Assignment #: Block: Mr. & Mrs. Smiley have decided that it is time to expand their family. The Smiley s, whose first names are Nick & Penny, are both heterozygous for each of the twelve traits that their offspring will inherit. During this activity your job is to: 1. Determine the genotype for Baby Smiley by flipping a coin; based on the genotype, determine the phenotype of Baby smiley 2. Determine Baby Smiley s Sex 3. Create Baby Smiley & name him/her 4. Complete the evaluation questions DATA TABLE A Traits Female (penny) Male (nickel) Genotype Phenotype Face Shape C c C c Eye Shape E e E e Hair Style S s S s Smile T t T t Ear Style V v V v Nose Style D d D d Face Color Y y Y y Eye Color B b B b Hair Length L l L l Freckles F f F f Nose Color R Y R Y Ear Color P T P T DATA TABLE B Female Male Genotype Phenotype Sex X X X Y

3 Part D: TRAIT COMPARISONS: How does your baby compare to those created by your classmates? Fill out the table below, starting first by circling the traits of your baby and then the traits of 3 of your classmates baby s. DATA TABLE C Traits Your Baby Classmate #1 Classmate #2 Classmate #3 Face Shape Circle Oval Circle Oval Circle Oval Circle Oval Eye Shape Star Blast Star Blast Star Blast Star Blast Hair Style Straight Curly Straight Curly Straight Curly Straight Curly Smile Thick Thin Thick Thin Thick Thin Thick Thin Ear Style Curved Pointed Curved Pointed Curved Pointed Curved Pointed Nose Style Down Up Down Up Down Up Down Up Face Color Yellow Green Yellow Green Yellow Green Yellow Green Eye Color Blue Red Blue Red Blue Red Blue Red Hair Length Long Short Long Short Long Short Long Short Freckles Present Absent Present Absent Present Absent Present Absent Nose Color Red Orange Yellow Red Orange Yellow Red Orange Yellow Red Orange Yellow Ear Color Pink Purple Teal Pink Purple Teal Pink Purple Teal Pink Purple Teal Gender Male Female Male Female Male Female Male Female Part E: Evaluation Questions: 1. Whose smiley has the most dominant traits? How many? (HINT: Count only the traits in BOLD that you circled above. 2. Whose smiley has the most recessive traits? How many? (HINT: Do not count any traits in ITALICS.) 3. For face color, yellow is dominant to green. Both Mr. and Mrs. Smiley are heterozygous. Complete the Punnett square below to show the probability of Mr. and Mrs. Smiley having a baby with green face color. a. YY b. Yy c. yy d. Yellow e. Green 4. Based on the Punnett square, what is the probability of Baby smiley having a green face? 5. Based on the data in TABLE C above, how many Baby smiley s had green faces? 6. How does your prediction in #4 compare with the actual data from #5?

4 7. Why did you only have to flip the male parent coin to determine the sex of Baby Smiley? 8. What is an allele? 9. How many alleles for each trait does Baby Smiley have? 10. How many alleles did Baby Smiley receive from each parent? 11.What is incomplete dominance? 12. Which Smiley trait (s) was a result of incomplete dominance? 13. Explain the difference between the genotype and the phenotype. 14. Nick Smiley (Dad) is a talented whistler and has won many whistling competitions. Do you think that your Baby Smiley will inherit an allele for whistling talent from Nick? Why or why not? 15. Penny Smiley (Mom) is very talkative. Her Mom (Baby Smiley s grandma) was also very talkative. Do you think Baby Smiley will inherit a gene for being talkative from Penny? Why or Why not?

5 16. Star eyes are dominant over blast eyes. Grandma and Grandpa Smiley are heterozygous for the star eye shape. If one of their heterozygous children married a smiley with blast shaped eyes, what percentage of their grandchildren should have star eyes? Complete the Punnett square to help. a. EE b. Ee c. ee d. Star e. Blast 17. Aunt Smiley has the cutest pointed ears in the world and would love to have children with pointed ears! What type of ears would her husband need to have in order for her to have a 100% chance of getting her wish? Complete the Punnett square(s) to help.