108 BI 101 Lab Maual Autosomal Dominant and Recessive Traits Figure 11.2 shows a
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Question
108 BI 101 Lab Maual Autosomal Dominant and Recessive Traits Figure 11.2 shows a few human traits 1. What is the homozygous dominant genotype for type of hairline? What is the phenotype? 2. What is the homozygous recessive genotype for finger length? ??? What is the phenotype? Short 3. Why does the beterozygous individual Fy have freckles?_tre eis domin ant paver Figure 11.2 Commonly inherited traits in humans The alleles indicate which traits are dominant and which are reces sive ?. Widow's peak ww or ww b. Straight harine: ww e. Shot fingers &S; or Sa f. Long ingers: ss c. Unattached earlobes EE or Ee d. Atached earlobes se g. Freckles: FF or Fr These genetic problems use the alleles from Figure 11.2 and Table 11.I 4. Maria and the members of her immediate family have attached carlobes. What is Maria's genotype? ee_ Her maternal grandfather has unattached earlobes. Deduce the genotype of her maternal grandfatherCe E Explain your answer The Croi bet oehwern El ad 5. Moses does not have a bent little finger, but his parents do. Deduce the genotype of his parents Deduce the genotype of Moses Explain your answer 6. Manny is adopted. He has hair on the back of his hand. Could both of his parents have had hair on the back of the hand?Could both of his parents have had no hair on the back of the hand? Explain your answer 120 Laboratory 11 Human Genetics 11-2Explanation / Answer
5. Moses does not have a bent little finger. It is a dominent inheritance , so parent genotype may be-
Mother = SS/Ss
Father = SS/ss
Moses genotype = ss
For dominent inheritance , to be normal phenotype both the alles should be recessive
6. Manny is adopted and has hair on the back of his hand.
Manny phenotype is not inherited from his parents because he is adopted, but his one or both of the original parents may have this type of phenotype.
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