Between two pure breeding farms to find out which form of a gene is dominant between two unknown forms to determine the genotypes between an offspring of parents find out which form of a gene is dominant de between a dominant phenotype and one recessive for that

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

a covalent bond, specfically triple bond