Fill in: selective, dominant, recessive,primary, model.

1 genes are typically represented in an organism's phenotype.
2 The law of segregation is now one of the principles of genetics.
3 breeding is a way of guaranteeing
that certain traits are inherited.
4 A system is an organism that is used to study and understand certain patterns.
5 An allele that is will only produce its characteristic when paired with an identical allele.