Describes how CF is a dominant or recessive trait

100 pts. with Instructors comments, and grading rubics.


    Points Earned Comments
Content Describes how CF is a dominant or recessive trait. 10/10 You correctly listed CF as a recessive trait. Well done!
  Explains conclusions regarding CF using the pedigree and principles of genetics. 10/10 Being a recessive trait, there are instances where neither parent has the disorder, but the child does. How did your pedigree help explain this fact?
  Correctly explains a Punnet square for a son in generation IV inheriting CF. 20/20 The genotype of the son in generation IV must be homozygous recessive because the disease is recessive. Both parents must be heterozygous for this to occur.
  Correctly describes Huntington’s disease as dominant or recessive. 10/10 You correctly listed Huntington’s as a dominant trait.
  Correctly explains a Punnet square for the first daughter in Gen. II not inheriting Huntington’s disease. 20/20 The genotype of this daughter must be homozygous recessive. The mother did not have the disease, so she is also homozygous recessive. The father has the disease, but some of his children do not, therefore, the father must be heterozygous. How does your pedigree help demonstrate this fact?
  Explains the role of chromosomes in inheriting genetic traits such as CF or Huntington’s disease. 10/10 Each chromosome carries one allele, an alternative copy of a gene. People inherit one allele from each parent. This means people inherit one CF or one Huntington’s gene from each parent. How do your Punnett squares help demonstrate this?
Mechanics Intellectual property is recognized with in-text citations and a reference page. 10/10  
  Rules of grammar, usage, and punctuation are followed. 5/5  
  Spelling is correct.


Total 100 points   Points earned 100/100 Great work demonstrating your understanding of genetics and the difference between dominant and recessive traits. Please let me know if you have any questions regarding this assignment.


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