Question 54
(Multiple Choice)
Use the following pedigree shown below for a family in which dark-shaded symbols represent individuals with one of the two major types of colon cancer.Numbers under the symbols are the individual's age at the time of diagnosis.
-What is the genotype of the deceased individual in generation II?
A)homozygous for a gene for colon cancer
B)homozygous for both cancer alleles from his mother
C)heterozygous for a gene for colon cancer
D)affected by the same colon cancer environmental factor as his mother
E)carrier of all of the several known genes for colon cancer
Answer