B
The other problems are not as easily solved; whereas, data collection over long periods of time is possible and was already done in the past, eg temperature and weather patterns. Therefore, this is the easiest limitation to overcome.
Cc * cc = Cc, Cc, cc, cc
Cc : 50% cc: 50%
Three kittens will have the genotype for curly ears and three won't have the genotype for it.
What are the following statements?