AP BIOLOGY

Detailed explanation-1: -This sometimes happens in mitosis, when sister chromatids fail to separate during anaphase. One daughter cell thus ends up with more chromosomes in its nucleus than the other. Likewise, abnormal separation can occur in meiosis when homologous pairs fail to separate during anaphase I.

Detailed explanation-2: -Does mitosis or meiosis have no pairing of homologs occurs? Meiosis involves the pairing of homologues, chromosomes similar to other chromosomes, whereas mitosis involves no pairing of homologues.

Detailed explanation-3: -Recall that, in mitosis, homologous chromosomes do not pair together. In mitosis, homologous chromosomes line up end-to-end so that when they divide, each daughter cell receives a sister chromatid from both members of the homologous pair.

Detailed explanation-4: -Pairing of homologous chromosomes is an essential feature of meiosis, acting to promote high levels of recombination and to ensure segregation of homologs.

Detailed explanation-5: -Chromosomes don’t pair up in mitosis because mitosis aims to produce offspring that are genetically identical to their parent cells.