Zadanie 19
Arrange these events in a cell undergoing meiosis. P: homologues separate Q: DNA is replicated R: homologues pair S: crossing over occurs A. P→R→Q→S B. Q→S→P→R C. Q→R→S→P D. R→Q→P→S
Halving chromosome number through meiosis
Trace two rounds of segregation from a diploid nucleus to haploid products and explain the role in sexual life cycles.
Tę umiejętność sprawdza 9 zadań wzorowanych na arkuszach IB z lat 2022–2025.
Zadania sprawdzające tę umiejętność: 9 Otwórz w wyszukiwarce z filtrami
Zadanie 11
A cell from a diploid animal is shown with its chromosome complement represented schematically. Which classification best fits the chromosome complement? A. A haploid unfertilized egg B. A cell with no homologous chromosome pairs C. A diploid body cell D. A…
- Materiał graficzny
Zadanie 33
During normal meiosis, when are sister chromatids pulled towards opposite poles? A. Before DNA has replicated B. During anaphase of the second division C. During prophase of the first division D. When homologues first pair
Zadanie 4b
(i) State the chromosome number in a gamete. (ii) State the number of autosomes in a somatic cell.
Zadanie 9
Which change normally occurs in meiosis I? A. Homologous chromosomes separate, reducing the number of chromosome sets B. All sister chromatids separate to give four nuclei immediately C. The two resulting nuclei acquire identical combinations of parental…
Zadanie 9
Which change normally occurs in meiosis I? A. Homologous chromosomes separate, reducing the number of chromosome sets B. All sister chromatids separate to give four nuclei immediately C. The two resulting nuclei acquire identical combinations of parental…
Zadanie 32
Compare one cell just after meiosis I with one cell just after meiosis II from the same normal meiotic sequence. Which is correct? A. DNA replication occurs between the two stages B. The earlier cell contains more chromatids C. The earlier cell has fewer…
Zadanie 32
Compare one cell just after meiosis I with one cell just after meiosis II from the same normal meiotic sequence. Which is correct? A. DNA replication occurs between the two stages B. The earlier cell contains more chromatids C. The earlier cell has fewer…
Zadanie 12
Which event distinguishes meiosis I from an ordinary mitotic division? A. DNA was replicated before division B. Spindle fibres attach to chromosomes C. Chromosomes move along a spindle D. Homologous chromosomes separate from one another