Essential Genetics 6th Edition by Daniel Hartl

تمرين 16

Assume that the trait in the accompanying pedigree results from simple Mendelian inheritance.
(a) Is the trait likely to be due to a dominant allele or a recessive allele? Explain.
(b) What is the meaning of the double horizontal line connecting III-1 with III-2?
(c) What is the biological relationship between III-1 and III-2?
(d) If the allele responsible for the condition is rare, what are the most likely genotypes of all of the persons in the pedigree in generations I, II, and III? (Use A and a for the dominant and recessive alleles, respectively.)