In prophase I, the first stage is known as leptotene. This stage involves the unwinding of the DNA structure to enable an exchange of alleles between homologous chromosome pairs. No crossing over occurs in prophase II. Therefore, prophase II does not feature leptotene.
How does prophase one differ from prophase two in meiosis?
In meiosis, how does prophase I differ from prophase II? During prophase I there is one diploid cell; during prophase II there are two haploid cells.
Which of the following is a characteristic seen in prophase 1 that does not occur in prophase 11?
28 Crossing over is a characteristic seen in prophase I that does not occur in prophase II. Crossing over then occurs between tetrads when genetic information is exchanged between non-sister chromatids. Biology Ch 9 and 10 Cell cycle/meiosis – Cell cycle.
What is the function of prophase 1?
Prophase I highlights the exchange of DNA between homologous chromosomes via a process called homologous recombination and the crossover at chiasma(ta) between non-sister chromatids. Thus, this stage is important to increase genetic variation.
What is meant by prophase?
Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.
What is a prophase 1?
1 : the initial stage of mitosis and of the mitotic division of meiosis characterized by the condensation of chromosomes consisting of two chromatids, disappearance of the nucleolus and nuclear membrane, and formation of mitotic spindle.
What is the key difference between prophase and prophase 1 quizlet?
The pairing of homologous chromosomes occurs in prophase 1, whereas such process cannot be seen in prophase 2. The process of crossing over and formation of the “Chiasmata” is unique to Prophase 1 while it is not found in Prophase 2.
What is the difference between prophase and prophase 1?
There are a couple of differences between mitotic prophase and prophase I. During prophase I, homologous chromosomes come together. … During prophase I, these homologous chromosomes pair up and sometimes intertwine. A process called crossing over can happen during prophase I.