Nondisjunction and chromosomal disorders Knowledge-Based Download PDF

Questions

1. 1.

   If a pair of homologous chromosomes fails to separate properly during anaphase I of meiosis, what chromosome composition will be found in the four resulting gametes, assuming meiosis II proceeds normally?

   • A) All four gametes will contain the normal haploid number of chromosomes ($n$).
   • B) Two gametes will have $n$, one gamete will have $n + 1$, and one gamete will have $n - 1$.
   • C) One gamete will have $n + 2$, one gamete will have $n - 2$, and two gametes will have $n$.
   • D) Two gametes will have $n + 1$ and two gametes will have $n - 1$.