A wavy-haired parent can either contribute a C or an s, so two wavy-haired parents have a fifty percent chance of having a wavy-haired child, a twenty-five percent chance of having a curly-haired child, and a twenty-five percent chance of having a straight-haired child.
The answer is no, high biological fitness in one environment doesn’t have to be high in another environment.
Biological fitness is a term used in evolutionary biology and it is the quantitative representation of how a genotype (or phenotype) is successful (reproductively) in a certain environment. Fitness depends on environment so it changes if the environment changes. The fitness of a genotype is manifested through its phenotype, which is affected by the environment.
The answers for 12 questions in attached pdf.