Question

which results of nondisjunction show how chromosome errors lead to genetic changes? (select the two correct answers.) (1 point) the copying of the entire set of all chromosomes. the creation of four daughter cells that are identical. the formation of sex cells that are missing a chromosome. the exchange of genes between matching chromosomes. the formation of sex cells that have an extra chromosome.

Explanation:

• "The copying of the entire set of all chromosomes" is polyploidy, not directly from nondisjunction's main genetic change - aneuploidy.
• "The creation of four daughter cells that are identical" is typical of mitosis (or meiosis II without errors), not related to nondisjunction - induced genetic change.
• "The formation of sex cells that are missing a chromosome" is aneuploidy (monosomy) caused by nondisjunction, as chromosomes fail to separate, leading to a gamete with one less chromosome.
• "The exchange of genes between matching chromosomes" is crossing - over, a normal part of meiosis, not a result of nondisjunction.
• "The formation of sex cells that have an extra chromosome" is aneuploidy (trisomy) caused by nondisjunction, as chromosomes fail to separate, leading to a gamete with one extra chromosome.

Answer:

C. The formation of sex cells that are missing a chromosome, E. The formation of sex cells that have an extra chromosome