How can each be described in the behavior of chromosomes during meiosis?

How can each be described in the behavior of chromosomes during meiosis? Which applies to which stage(s) of meiotic cell division? 3. Be familiar with the following genetics terminology: Gene, locus, allele, dominant, recessive phenotype, genotype, heterozygous, homozygous, testcross, carrier, penetrance, pleiotropic, polygenic, continuous variation, epistasis, multifactorial, complete dominance, incomplete dominance, co-dominance. How does Tay-Sachs disease illustrate that a single trait can exhibit complete, incomplete, and co-dominance?