Answer:
In simple words, Beyond characteristics like the mother's nutrition, alcohol usage, and anxiety level, a foetus has minimal opportunity to be influenced by its surroundings before birth. As a result, genetics plays an especially crucial role in prenatal development.
The manner of transfer of distinct traits to the foetus is determined by inherited weak, predominant, and gender related genes. A single fertilised cell's development and metamorphosis into a kid is complicated and extensive.