Zadanie 1a
A student observes a field of stained dividing root-tip cells. Describe how to determine a mitotic index for this field.
Replicated chromosomes before nuclear division
Explain why DNA is duplicated before mitosis or meiosis and identify the resulting sister chromatids.
Tę umiejętność sprawdzają 3 zadania wzorowane na arkuszach IB z lat 2023–2024.
Zadania sprawdzające tę umiejętność: 3 Otwórz w wyszukiwarce z filtrami
Zadanie 4b
Related island birds have evolved different beak shapes and feeding habits. (i) Outline how the differences in beaks could have evolved. (ii) Describe how chromosome number is maintained when a growing bird produces new body cells.
Zadanie 5
A diploid root cell of a plant has 2n = 12. It has completed DNA replication and is in late prophase of mitosis. How many chromatids does it contain? A. 6 B. 12 C. 24 D. 48