PATHOLOGY MCQ
CELL DAMAGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
What causes genetic variation in meiosis?
|
|
chromosomes lining up
|
|
|
crossing over of chromosomes
|
|
|
separation of chromosomes
|
|
|
chromosomes pulling apart
|
Explanation:
Detailed explanation-1: -During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.
There is 1 question to complete.