Crossing-Over (Meiosis) — Definition & Overview
Read this topicExplanations 5
- What Is Crossing-Over? Crossing-over is when similar pieces of homologous chromosomes switch places. This is a very important process during meiosis. Crossing-over happens durin…
By Aaron Lauer, Alex Federspiel, Deena Hauze, Gabi Slizewska, Valeri Natole, Mario Janakis
- Why Is Crossing-Over Important? During meiosis, homologous chromosomes are paired up and form tetrads. Homologous chromosomes have the same shape, size, and carry the same type …
By Deena Hauze, Alex Federspiel, Gabi Slizewska, Valeri Natole, Mario Janakis
- Result of Crossing-Over During prophase I of meiosis, homologous chromosomes align in a process called synapsis to form a tetrad. In this formation, parts of non-sister chromati…
By Gabi Slizewska, Deena Hauze, Alex Federspiel, Valeri Natole, Mario Janakis
- (Video) Chromosomal Crossover by A3Academy Crossing-over happens when chromosomes stick together and exchange DNA with each other. As a result, no two zygotes will be the same. …
By Mario Janakis
- (Video) Meiosis: Where the Sex Starts by CrashCourse Crossing-over is an important part of meiosis where new genetic combinations are created. In this video by Crash Course, Han…
By Mario Janakis
Problems 20
- During what stage of meiosis does crossing over happen?
- Why is crossing over important?
- How does crossing over affect the alleles of a chromosome?
- Fill in the blank: Crossing over happens to 000‾\underline{\phantom{000}}000.
- What is a tetrad made of?
- In the diagram above, homologous chromosomes A and B undergo crossing over to create products C-F. Which of the products are recombinants?
- The figure above shows two homologous chromosomes and their products after meiosis. Which of the products (1-4) are the recombinants?
- During crossing over, what is the name for the location where the two non-sister chromatids touch?
- The diagram above shows a chromosome (blue) and 4 genes on that chromosome (A-D). Suppose this chromosome undergoes crossing over with its homolog. Where would the cross over mo…
- Use the picture above to answer the following question. Between which of the following can crossing over occur?
- The picture above shows a cell containing two homologous chromosomes. Use it to answer the following question. Between which of the following can crossing over occur?
- What cellular process is shown above?
- Which of the following is not a reason for why genetic diversity is important?
- What structure needs to form in order for crossing over to occur?
- How many chromatids make up a tetrad?
- Translocation is a type of chromosomal mutation where parts of chromosomes are swapped, as pictured above. How is this mutation different from crossing over?
- When talking about meiosis, what is synapsis?
- The picture above shows the event called crossing over. What is the arrow pointing to?
- Which of the following is another term for the chromosomal process of crossing over?
- If the homologous chromosomes above undergo crossing over, what might the products look like?