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marenh04938
14.05.2021 •
Biology
Crossing-over is a process that occurs during the formation of gametes. How does
crossing-over lead to genetic variation?
A. The number of mutations decreases.
B. The number of chromosomes increases.
C. The number of chromosomes decreases.
D. The number of combinations of alleles increases.
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Ответ:
After ejaculation, sperm can live inside the female body for around 5 days. The fluid in a woman's reproductive tract has all of the nutrients that sperm need for their survival during that time.