Question

some chromosomes in a gamete have new combinations of alleles along their length. these are different from the allele combinations of the corresponding chromosomes of the individual producing the gamete. which process most likely formed these genetically unique chromosomes?
(a) insertion
(b) inversion
(c) crossing - over
(d) nondisjunction

Explanation:

Crossing - over occurs during meiosis when homologous chromosomes exchange genetic material, resulting in new combinations of alleles on the chromosomes in gametes. Insertion is the addition of extra DNA sequence. Inversion is the reversal of a segment of DNA. Nondisjunction is the failure of chromosomes to separate properly during cell division.

Answer:

C. crossing - over