MTIa_key bis 101

MTIa_key bis 101 - 1 Name:_ Last four digits of ID _ BIS...

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1 Name:______________________________ Last four digits of ID __________________ BIS 101 - 003 MIDTERM I October 15, 2010 READ THE FOLLOWING INSTRUCTIONS: Write your name legibly on each page of this exam. All work must be done in ink . Show all your work. Points will be subtracted for incorrect answers in multiple-choice questions. However, you will not get a negative total score for such a question. This exam is worth 100 points. You have 50 min. to complete the exam. Good Luck!
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2 Name:______________________________ P a g e : 3 ________ 4 ________ 5 ________ 6 ________ 7 ________ 8 ________ 9 ________ Total ________
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3 Name _______________________ (1) Piebald spotting is a human condition in which there are patches of skin that lack pigmentation. Two adults with piebald spotting have one child who has the trait and a second child with normal skin pigmentation. Write down the genotypes of the parents and explain why you think the trait is dominant or recessive. (8 points) The trait must be autosomal dominant. In that case both parents can be heterozygous and children segregate for the trait. mother Pp father Pp child 1 Pp child 2 pp If the trait was recessive both parents would have to be homozygous recessive ( pp ) and both children would have to be phenotypically piebold. (2) Write down all possible egg genotypes that a female of the genotype Aa; Rr; Qq can produce. All genes are autosomal and their segregation conforms to Mendel’s second law. Hint: Use the path diagram. (8 points) A R Q A R A A R q A r Q A r A r q a R Q a R a R q A a r Q a r a r q (3) Consider the pedigree below for a rare human muscle disease. Suggest the most likely type of inheritance of this disorder. (6 points) The muscle disease is a cytoplasmicly controlled (in the mitochondrial genome).
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4 Name _______________________ (1) In a species of tropical fish, a colorful orange and black variety called montezuma
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MTIa_key bis 101 - 1 Name:_ Last four digits of ID _ BIS...

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