Question

A woman has a son with her first partner, and that son has a son of his own-the grandchild of the original woman. The original woman also has a son with a second partner, who also grows up to have another son; a second grandchild. What is the relatedness between the grandchildren, 0.0625 0.25 0.125 2 0.875

thats the correct answer but i need to know why

please show work

Answer 1

Answer-

Relatedness between two grandchildren is 0.0625

The explanation is given below:

woman Ist partner H 2nd partner 1 2 3 0.5 0.5 I o 1 sont 2 0.5 son 2 3 0.5 4 T grandson i grandson 2 1 2 Relatedness (2) is defined as the proportion of genes shared by two individuals in family. relatedness between any parent and own child is 0.5 rrelatedness betreleen talo siblings = 0.5 Here, relatedness between grandson I (I-1) and son 1 (II-2) 1 11 sont (1-2) and mother (1-2) 0.5 mother (I-2) and son 2 (#3) = 10.5 son 2 (I-3) and grandson (1-2) Here relatedness is 0.5, because they share half of =10.5 their genes. so, relatedness between two grandchildren = 0.5X0.5 80.5X0.5 -0.0625