Making a Baby in Your Biology Class

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Making a Baby in Your Biology Class

Introduction: congratulations! Today is your lucky day…you are going to have a baby! In today’s lab you will determine your genotype of certain traits, create a sperm or egg, and match you code with another gamete in the class, and predict your baby.

Part A: Determining Your Dominant and Recessive Traits: Your Genotype

Determine the genotype of your features using the chart below. If you show a dominant trait, enter ONE BIG letter in the first column of your genotype chart. If you show a recessive trait, enter TWO LITTLE letters in both columns of your genotype chart.

Characteristic Dominant Trait Recessive Trait Your genotype

1. Sex - - ______

2. Face Shape Oval -O Long - 0 ______

3. Skin Coloration* Dark - S Fair - s ______

4. Freckles Yes - F No - f ______

5. Hair Color Black/Brown - B Blonde/Red - b ______

6. Hair Wave Wavy - W Straight - w ______

7. Hair Condition Normal - M Oily/Dry - m ______

8. Widows Peak Yes - P No - p ______

9. Eye Color Brown - H Blue/Green - h ______

10. Eye Shape Round - U Almond - u ______

11. Eye Lashes Long - C Short - c ______

12. Nose Width* Large - N Short - n ______

13. Nose Shape Straight - V Ski-jump - v ______

14. Lip Shape Full - L Thin - l ______

15. Dimples Yes - D No - d ______

16. Ear Length* Long - E Short - e ______

17. Attached ear lobes Yes - Q No - q ______

18. Chin Cleft Yes - G No - g ______

19. Handedness Right - I Left - i ______

20. Hitchhikers thumb Curved - K Straight - k ______

21. Tongue Roll Yes - R No - r ______

22. Thumb Folding Right on Top - T Left on Top – t ______

23. Bent Pinky Finger Straight - A Bent - a ______

2. Complete your genotype by comparing your dominant and recessive traits with your parent’s traits. Using the chart n the back of this worksheet (parent’s features), determine your second letter of your dominant traits using the following rules:

a. If both your parents show the same trait as you, add a BIG letter beside your first Big letter

(Example: B B) You are therefore homozygous dominant for this trait.

b. If one or both of your parents don’t have the same trait as you, add a LITTLE letter beside your BIG

letter. (example: B b) You are therefore heterozygous for this trait.

c. If you don’t know, add a LITTLE letter.

Observation Sheet (Your parents’ features)

Directions: Observe your parents and Circle their characteristic. Dominant Traits on left, recessive traits on right.

Characteristic Mother Father .

1. Sex X X X Y

2. Face Shape Oval Long Oval Long

3. Skin Coloration* Dark Average Fair Dark Average Fair

4. Freckles Yes No Yes No

5. Hair Color Black/Brown Blonde/Red Black/Brown Blonde/Red

6. Hair Wave Wavy Straight Wavy Straight

7. Hair Condition Normal Oily/Dry Normal Oily/Dry

8. Widows Peak Yes No Yes No

9. Eye Color Brown Blue/Green Brown Blue/Green

10. Eye Shape Round Almond Round Almond

11. Eye Lashes Long Short Long Short

12. Nose Width* Large Average Short Large Average Short

13. Nose Shape Straight Ski-jump Straight Ski-jump

14. Lip Shape Full Thin Full Thin

15. Dimples Yes No Yes No

16. Ear Length* Long Average Short Long Average Short

17. Attached ear lobes Yes No Yes No

18. Chin Cleft Yes No Yes No

19. Handedness Right Left Right Left

20. Hitchhikers thumb Curved Straight Curved Straight

21. Tongue Roll Yes No Yes No

22. Thumb Folding Right on Top Left on Top Right on Top Left on Top

23. Bent Pinky Finger Straight Bent Straight Bent

* If your parents show incomplete dominance for traits #3, #12, and #16, they are heterozygous for that trait.