I need to do a data analysis in R. My data consists of 2 populations of animals that have 2 different types of genomes. The children are always born as twins. I also know the mothers' weight and the combined weight of the children after 14 days. I want to fit a model that explains the variability of the twins' weights after 14 days.
population 1 and 2 genome 1 and 2 twins both male, both female, one female and one male mother's weight twins weight after 14 days
I'm planning to do an ANCOVA, but is there a better analysis I should use?
All suggestions are welcome. Big thanks for the help.