ONE EIGHTH CONTEST 2025
Opoku Ware SHS - 67 points
Fijai SHS - 36 points
Amenfiman SHS - 30 points
ONE EIGHTH CONTEST 2025
Aburi Girls' SHS - 56 points
Apam SHS - 46 points
Konongo Odumase SHS - 44 points
ONE EIGHTH CONTEST 2025
Accra Academy - 48 points
Aggrey Memorial Zion SHS - 34 points
Kwahu Tafo - 26 points
ROUND 1
SECOND SET OF BIOLOGY
PREAMBLE
Indicate the stage in meiosis in which the given event occurs.
1. Homologous chromosomes are pulled apart with one chromosome from each pair going to opposite poles of the cell.
ANSWER: Anaphase I
2. Chromatids reach their poles and nuclear envelopes reform around them.
ANSWER: Telophase II
3. Chromosomes condense and homologous chromosomes pair up in a process called synapsis.
ANSWER: Prophase I
EXPLANATION
1. In Anaphase I of meiosis, homologous chromosomes (not sister chromatids) separate and move toward opposite poles of the cell.
2. In Telophase II, the separated chromatids arrive at opposite poles and new nuclear envelopes form, completing meiosis II.
3. During Prophase I, homologous chromosomes pair up (synapsis) to form tetrads, which is essential for crossing over.
PRACTICE QUESTIONS
1. How many divisions are there in meiosis?
ANSWER: Two, meiosis I and meiosis II.
2. Name the sub-stages of prophase I.
ANSWER: Leptotene, zygotene, pachytene, diplotene and diakinesis.
3. In which sub-stage does crossing over occur?
ANSWER: Pachytene.
4. What is a chiasma?
ANSWER: The point where non-sister chromatids have crossed over.
5. What is seen at the equator in metaphase I?
ANSWER: Bivalents (pairs of homologous chromosomes).
6. What separates in anaphase II?
ANSWER: The sister chromatids.
7. What is the result of telophase I?
ANSWER: Two haploid cells.
8. How many cells are produced at the end of meiosis?
ANSWER: Four haploid cells.
9. What is independent assortment?
ANSWER: The random orientation of bivalents at metaphase I, giving new combinations of chromosomes.
10. Which division of meiosis is similar to mitosis?
ANSWER: Meiosis II.
11. What is cytokinesis?
ANSWER: The division of the cytoplasm.
12. What are spindle fibres made of?
ANSWER: Microtubules.