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Its unlikely there isnything missing, and more likely there is too much. It could be over watering, or if anything a PH imbalance or too much of something. Yellow is often nitrogen burn.
With her being only one-week-old I highly doubt she's missing anything, you could be overwatering which can cause deficiencies. Hopefully, I answered your question and remember " Happy Growing and Free your mind one puff at a time ".