Question

Using the following information below, fill out Table 1 for you. PTC: taster (T-), non-taster (tt) Sodium benzoate: taster (B-), non-taster (bb) Hair type: Is your hair naturally wavy (CC), wavy (Cc), or straight (cc)? Hair color: Dark hair (DD or Dd) is dominant over light colored hair (dd) Widow's peak: the presence of a window's peak is dominant (WW or Ww) over absent (ww) Eyebrows: bushy (BB or Bb) dominant over fine (bb) Eye color: non-blue (EE or Ee) is dominant over blue (ee) Eyelashes: Long (LL or LI) is dominant over absent (II). Long is greater than 1 cm. Freckles: (FF or Ff) is dominant over absent (ff) Nose profile: Convex nose (NN of Nn) is dominant over straight nose(nn) Earlobes: free or unattached to sides of the head (UU or Uu) is dominant over attached (uu) Lip thickness: thick lips (TT or Tt) are dominant over thin lips (tt) Tongue roller: the ability to roll into U shape (RR or Rr) is dominant over non-rollers (rr) Mid-digital hair: presence (H-), absence (hh) Bent little finger: bent (B-), straight (bb) Hand clasp: Left over right (L-), right over left (ll) Foot arch: high arch (A), low arch or flat feet (aa) Hitch-hiker's thumb: > 50 degree (H-), < 50 degree (hh) Palmaris longus muscle tendon: absent (A-), present (aa) Your phenotype and genotype compared with your parents. Which parent do you have more in common with? Calculate the percent of agreement with each parent in order to answer the question (i.e. # of phenotypes that agree with mom/17 times 100).

Answer 1

Phenotype: physical characteristics e.g hair colour-dark or light; hair type- curly, wavy or straight; eye colour- blue or non blue; ability to roll your tongue into a U-shape or not etc.

Genotype : refers to the alleles you have .

If for example you have light coloured hair, your genotype will be dd.

If you have wavy hair, your genotype will be Cc.

If your eyes are non blue, your genotype could be EE or Ee.

If you can roll your tongue, your genotype will be RR or Rr.

So for each of the physical characteristics given, you have to see what your and your parents characteristics are, and correspondingly what your genotype is and fill the table accordingly.

20. By comparing your physical chracteristics or phenotype with your parents, you will be able to deduce with which parent you have more in common with.