When paternal and maternal chromosomes change their materials with each other in cell division, then this event is called:
Correct answer: D. Crossing over
- A. Bivalent forming
- B. Tetrad
- C. Synapsis
- D. Crossing over
Explanation
Crossing over is responsible for inducing variability. It involves an exchange of equal segments of non-sister chromatids belonging to two different but homologous chromosomes. Crossing over takes place at four stranded stages. Only two of the four chromatids take part in crossing over. The other two are called non-crossovers. Zygotene is characterized by pairing of homologous chromosomes which is called synapsis. The first meiotic division which is completed at first telophase may be followed by cytokinesis giving rise to a dyad.
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
Number of mitotic divisions are required to make 128 cells?
Microtubule is involved in which of the following?
Spindle fiber unit with which, the structure of chromosomes attaches?
Meiosis II performs:
Each kinetochore gets _ fibers in mitosis:
The non-dividing phase that occurs at the beginning of the cell cycle is known as the interval between two cell divisions called: