SmithLifeScience                                     Name __________________  Period ____

Genetic Siblings

Student Worksheet

Heads will inherit the first allele in a pair
Tails will inherit the second allele in a pair
Circle the allele the parent will pass on to the child.
Write the genotype.
Circle the phenotype.
Flip for all traits.
Draw your brother or sister.

# Trait Female Allele Male Allele Genotype     Phenotype   
  Baby's Gender X   X    Y    Male     Female

   The name of my brother/sister is:

1. Face Shape A      a A      a   Round      Square
2. Chin Size B      b B      b   Very Prominent   Less Prominent
Only flip a coin for Traits 4 and 5 if you have a  Very Prominent Chin
3. Chin Shape C      c C      c   Round      Square
4. Cleft Chin D      d D      d   Present      Absent
 
5. Skin Color E e   F f  G g E e   F f  G g   Skin Color:
6. Hair Color H h   I i  J j K k H h   I i  J j K k   Hair Color
Only flip a coin for Trait 7 if you had 4 or less dominant letters for Hair Color
7. Red Color Tint L1      L2 L1      L2   Dark Red   Light Red   No Red
8. Hair Type M1      M2 M1      M2   Curly    Wavy   Straight
9. Widow's Peak O      o O      o   Present      Absent
10. Eye Color P   p     Q  q P   p     Q  q  

Eye Color:

11. Eye Distance R1      R2 R1      R2   Close    Average    Far Apart
12. Eye Size S1      S2 S1      S2   Large    Medium   Small
13. Eye Shape T      t T      t   Almond      Round
14. Eye Slant U      u U      u   Horizontal     Upward Slant
15. Eyelashes V      V V      v   Long      Short

 

 

# Trait Female Allele Male Allele Genotype     Phenotype   
16. Eyebrow Color W1      W2   W1     W2    Darker, Same, Lighter than hair
17. Eyebrow Thickness Z      z Z      z   Bushy      Fine
18. Eyebrow Length A      a B      b   Not Connected     Connected
19. Mouth Size B1      B2 B1      B2   Long     Medium    Short
20. Lip Thickness C      c C      c   Thick Thin
21. Dimples D      d D      d  

Present     Absent

22. Nose Size E1      E2 E1      E2  

Large    Medium    Small

23. Nose Shape F      f F      f   Rounded      Pointed
24. Nostril Shape G      g G      g   Rounded      Pointed
25. Earlobes H      h H      h   Free      Attached
26. Darwin's Earpoint I      i I      i   Present      Absent
27. Ear Pits J      j J      j  

Present     Absent

28. Hairy Ears K      k K      k   Present      Absent
29. Freckles on Cheeks L      l L      l   Present      Absent
30. Freckles Forehead M      m M      m   Present Absent

Based on Genetics of Parenthood-Face Lab