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.
Last updated
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.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.