Question

which events during meiosis result in new gene mixes that can be passed to offspring? (select the two correct answers.) (1 point) the process of crossing - over between chromosomes. the separation of identical sister parts. the failure of chromosomes to separate, called nondisjunction.

Explanation:

1. Crossing - over (recombination) between homologous chromosomes during prophase I of meiosis exchanges genetic material, creating new combinations of genes.
2. The separation of homologous chromosomes (and later sister chromatids) during meiosis I and II, along with independent assortment, leads to different combinations of chromosomes in gametes, resulting in new gene mixes. However, the option "The separation of identical sister parts" is incorrect as sister chromatids are identical and their separation just divides the replicated genetic material. Nondisjunction is an error that leads to abnormal chromosome numbers, not new gene mixes. Wait, there seems to be a mistake in the options provided. Usually, another correct event is independent assortment (the random alignment of homologous chromosomes at the metaphase plate during meiosis I), but among the given options, the correct ones should be:

• The process of crossing - over between chromosomes: because it swaps genetic segments between non - sister chromatids of homologous chromosomes, creating new allele combinations.
• (There is a missing option like independent assortment, but among the given, if we assume a typo and the second correct is related to the random distribution of chromosomes, but from the given, maybe the user missed an option. Wait, the original question's options might be incomplete. But based on the given three:

Crossing - over is correct. The separation of identical sister parts (sister chromatids) just gives each daughter cell the same genetic material as the parent cell at that stage, so it doesn't create new gene mixes. Nondisjunction causes aneuploidy, not new gene mixes. So maybe there was a mistake in the options provided, but if we have to choose from the given, the correct one is "The process of crossing - over between chromosomes" and maybe a missing option. But since the question says select two, perhaps there was a typo and the second option should be about independent assortment or the random alignment of chromosomes. Alternatively, maybe the user made a mistake in the options. But based on standard meiosis, crossing - over and independent assortment (or the random distribution of chromosomes during anaphase I and II) create new gene mixes. Since "The separation of identical sister parts" is incorrect and "nondisjunction" is incorrect, there is an error in the options. But if we proceed with the given, the only correct one among the three is "The process of crossing - over between chromosomes", but the question says select two. Maybe the original options had a different set.

Answer:

A. The process of crossing - over between chromosomes (assuming there was a missing correct option, but from the given, this is one correct. If we consider a possible typo and the second correct is related to the random assortment, but since it's not given, there might be an error in the question's options. However, based on the provided options, the correct answer for one is "The process of crossing - over between chromosomes", and if we assume a mistake and the other correct is not present, but the question says select two, so maybe the user missed an option. But as per the given, the correct one is "The process of crossing - over between chromosomes" and perhaps a mislabeled option.