LS4 MT1 practice key

LS4 MT1 practice key - 1 Question 1. Note that the female...

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1 Question 1. Note that the female is the heterogametic sex.
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2 2. Pedigree The following pedigree concerns a very rare human disorder that causes premature puberty in males. Which mode(s) of inheritance can explain the above pedigree (circle the correct answer; there may be more than one correct answer). ASSUME COMPLETE PENETRANCE EXCEPT FOR F. A B C D E F A. Autosomal Dominant B. Autosomal Recessive C. X-linked dominant D. X-linked recessive E. Y-linked F. Y-linked with incomplete penetrance 3 In human beings, the absence of molars is inherited as a dominant trait. If two heterozygotes have four children, what is the probability that: 6A. all will have no molars? Show your calculation AND CIRCLE ANSWER. 3/4 x 3/4 x 3/4 x 3/4 = 81/256 6B. the first two will have molars and the second two will have no molars? Show your calculation AND CIRCLE ANSWER. 1/4 x 1/4 x 3/4 x 3/4 = 9/256 17 16 15 14 13 12 11 10 8 9 6 4 5 1 2 7
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3 4. ABO pedigree A human pedigree is shown below. The ABO blood types of some of the members of the family
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This note was uploaded on 04/15/2010 for the course LS LS 4 taught by Professor Ribaya during the Winter '07 term at UCLA.

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LS4 MT1 practice key - 1 Question 1. Note that the female...

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