Question

What causes genetic variation during human sexual reproductive processes?

The zygote cell divides many times through mitosis to form a blastocyst during embryo formation.

Adjacent chromatids in homologous chromosomes cross over during meiosis in sperm and egg formation.

Mitochondria, containing mitochondrial DNA, collect in the midpiece of sperm cells during sperm formation.

Spindle fibers form between centrioles before attaching to chromosomes during meiosis in gamete formation.

Answer 1

The answer is b

Step-by-step explanation:

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Answer 2

"Adjacent chromatids in homologous chromosomes cross over during meiosis in sperm and egg formation" is the one among the following choices that describes what causes genetic variation during human sexual reproductive processes. The correct option among all the options given in the question is the second option.