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2. LMS is very rare human hereditary disorder resulting in spasticpara paraplegia and mental retardation. LMS is caused by arecessive allele with Mendelian inheritance. A couple, Ross andRachel would like to have children. However, Ross’s great-greatgrandfather was known to have had a daughter(from a previousmarriage, not with Ross’s great-great grandma) who suffered fromLMS. Rachel has a brother who has LMS. Now, Ross and Rachel areconsidering having a child.

a. Draw a pedigree of the above family.
b. What is the prob. that Ross and Rachel's first child with alsohave LMS?

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Nelly Stracke
Nelly StrackeLv2
28 Sep 2019

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