In humans all individuals inherit two copies of most genes, one from their mothe
ID: 3062539 • Letter: I
Question
In humans all individuals inherit two copies of most genes, one from their mother and one from their father. Suppose that, for a gene of interest, each copy can be in one of three states, labeled A1, A2, or A3. The identity of the pair of genes that an individual carries including the parent from which each was inherited is referred to as their genotype. Suppose the experiment of interest is the selection of a random individual from the population, and the outcome of interest is her genotype for this specific gene.
a) How many elements are in the sample space?
Explanation / Answer
A) A gene is made of one copy from mother, which can be be in 3 states and one copy from father, which also can be in 3 states.
So, number of elements in sample space = 3 x 3
= 9
The elements are
(A1,A1), (A1,A2), (A1,A3), (A2,A1), (A2,A2), (A2,A3), (A3,A1),(A3,A2), (A3,A3)