A mother's diet before conception can permanently affect how her child's genes function, according to a study published in Nature Communications. A 2003 study found that a female mouse's diet can change her offspring's coat color by permanently modifying DNA methylation.
The path of an egg cell: After the egg breaks through the ovarian wall, it travels into the fallopian tube which overlies each ovary. From there, it reaches the uterus or womb. If the egg is fertilized by a sperm cell, it is implanted in the endometrium.
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All viruses that spread within their host tissues (systemically) can be transmitted by grafting branches or buds from diseased plants on healthy plants. Natural grafting and transmission are possible by root grafts and with parasitic dodder (Cuscuta species). Vegetative propagation often spreads plant viruses.
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