what is the best analysis for r when are twins born how to determine genetic variation of twins why do twins get heavier how long do twins weigh how do you calculate twins weights in a r model? what is the r analysis of twins when do twins gain weight in an animal population when are twins born and at what weight how many days does twins have to be born r analysis of twins after 14 days how long do twins weigh what is r analysis? how long is the average weight of twins for a year what is the best analysis to use? if you are analyzing a human genome can you find the weight of a twin? r how to analyse twins if twins are born as twins, why is this important? what is the most accurate method for analyzing genetic variability? how to calculate twin weight