Question

question 16 of 16
what causes nondisjunction during meiosis ii?
○ sister chromatids fail to separate
○ chromosomes undergo unequal crossing over
○ homologous chromosomes fail to separate
○ sister chromatids fail to recombine
○ chromosomes fail to replicate

Explanation:

Meiosis II involves the separation of sister chromatids. Nondisjunction here occurs when sister chromatids do not split properly, leading to abnormal chromosome numbers in gametes. Other options describe different errors: unequal crossing over is a recombination error, homologous chromosome failure is meiosis I nondisjunction, recombination failure is not nondisjunction, and replication failure occurs earlier in the cell cycle.

Answer:

sister chromatids fail to separate