A curved “hitchhiker’s thumb” is recessive to a straight thumb. The following pedigree traces

Question 12 options:
A curved “hitchhiker’s thumb” is recessive to a straight thumb. The following pedigree traces the presence of hitchhiker’s thumb in a family. Identify the genotypes of all the people shown in the following pedigree chart. Enter genotypes as SS, Ss, ss and uncertain genotypes as S_. 3 marks



I-1 is
I-2 is
II-1 is

II-2 is II-3 is II-4 is
 

III-1 is

 III-2 is III-3 is
IV-1 is

 IV-2 is IV-3 is IV-4 is

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