Inheritance patterns cannot always be explained by Mendel's models of inheritance. If a pair of homologous chromosomes fails to separate during meiosis I, select the choice that shows the chromosome number of the four resulting gametes with respect to the normal haploid number (n)?
A) n + 1; n + 1; n - 1; n - 1
B) n + 1; n - 1; n; n
C) n + 1; n - 1; n - 1; n - 1
D) n + 1; n + 1; n; n

Question

Quizplus · Accepted Answer

When homologous chromosomes fail to separate during meiosis I, it results in two gametes with an extra chromosome (n + 1) and two gametes missing a chromosome (n - 1).

Inheritance Patterns Cannot Always Be Explained by Mendel's Models of Inheritance