18 Questions
During prophase I, what holds the homologs together tightly?
Synaptonemal complex
What is the result of crossing over during prophase I?
Cells that differ genetically from each other and from the parent cell
During which stage of meiosis do homologous pairs line up at the metaphase plate?
Metaphase I
What is the purpose of cohesins during meiosis?
To hold sister chromatids together
What is unique to meiosis I?
Synapsis and crossing over in prophase I
What is the end result of meiosis?
Four cells that differ genetically from each other and from the parent cell
What is the number of combinations possible when chromosomes assort independently into gametes?
2n, where n is the haploid number
During which stage of meiosis do chromosomes line up at the metaphase plate?
Metaphase II
What is the result of crossing over during meiosis?
Recombinant chromosomes that combine DNA from two parents
During which stage of meiosis do sister chromatids separate?
Anaphase II
What is the process by which homologous chromosomes pair up during meiosis?
Synapsis
On average, how many crossover events occur per chromosome during meiosis?
One to three crossover events
What occurs during synapsis?
Nonsister chromatids are held together
What is the result of crossing over during prophase I?
Genetic variation increases
What occurs during anaphase I?
Homologous pairs move to opposite poles
What is the result of random fertilization?
Each zygote has a unique genetic identity
What occurs during prophase I that increases genetic variation?
Synapsis and crossing over
What is the approximate number of diploid combinations possible from independent assortment during meiosis?
70 trillion
Learn about the process of crossing over and synapsis during prophase I of meiosis, including the role of cohesins, synaptonemal complex, and DNA repair. Understand how homologous chromosomes interact and exchange genetic material.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
