THE CELL
CELL COMMUNICATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
The chromosomes that pair up at the beginning of meiosis, are called ____
|
|
sister chromatids
|
|
|
diploid pairs
|
|
|
homologous chromosomes
|
Explanation:
Detailed explanation-1: -Synapsis is the pairing of two homologous chromosomes that occur during meiosis. This takes place during the prophase stage of meiosis I.
Detailed explanation-2: -The first stage in Meiosis I is prophase I. During this stage the DNA condenses into chromosomes. During prophase I, homologous chromosomes pair up and exchange sections of DNA. This is called recombination or crossing over.
Detailed explanation-3: -During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed in the microscope.
There is 1 question to complete.