Which statements describe crossing over? Check all that apply. Crossing over occurs during prophase II of meiosis. Crossing over combines a sperm cell with an egg cell. Crossing over happens when pairs of chromosomes pair up. Crossing over ensures that a new cell is identical to the original cell. Crossing over creates new combinations of genes on chromosomes.

Crossing over happens when pairs of chromosomes pair up

Crossing over creates new combinations of genes on chromosomes.

Explanation:

The correct answer would be that crossing over happens when pairs of chromosomes pair up, exchange chromosomal segments, and create new combinations of genes on chromosomes.

Crossing over occurs during prophase I of meiosis when homologous chromosomes pair up to form a tetrad. Paired chromosomes then exchange chromosomal segments containing genes leading to a new combination of genes on each chromosome. Hence, the resulting daughter cells are genetically different from the original cell.

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