Explain how positional signals alter gene expression as initially unspecialized embryonic cells acquire different functions.
Tę umiejętność sprawdzają 3 zadania wzorowane na arkuszach IB z lat 2022–2025.
Early embryonic cells receive different concentrations of signalling molecules according to their positions. Which outcome can these gradients direct? A. Immediate loss of all chromosomes B. Replication of only the mitochondrial genome C. Development of…
Specialized nerve cells develop during formation of the nervous system. Describe the formation of neurons.
A livestock procedure begins with fertilization, followed by divisions and separation of the cells shown. What is structure X before separation? A. A cluster of unfertilized eggs B. An early embryo C. One ovarian follicle D. A cluster of independently…
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