In a meiosis I diagram, which unique event occurs in the phase labelled as A?
Correct answer: B. Pairing of homologous chromosomes and crossing over
- A. Separation of sister chromatids
- B. Pairing of homologous chromosomes and crossing over
- C. Chromosome replication
- D. Formation of two haploid nuclei
Explanation
Only in Prophase I do homologous chromosomes synapse and exchange genetic material - increasing genetic variation.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Cell Structure and Function questions
In the given diagram showing condensation of chromatin into visible thread‑like structures, chromosomes first appear in which stage?
In a metaphase chromosome diagram, the two identical halves are called:
During cell division, the spindle fibers get attached to condensing chromosome at a highly differentiated region. This region is called as:
In the labeled meiosis II diagram, what happens in the given phase?
In meiosis I diagram, the crossing‑over structure shown between homologous chromosomes is called:
The given meiosis I diagram shows a sub-stage of prophase I, which sub-stage is it?