AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Crossing over is
A
important in genetic recombination
B
what makes a cell become cancerous
C
a key process that occurs during mitosis
D
an important mechanism in chromosome repair
Explanation: 

Detailed explanation-1: -Crossing over is important for the normal segregation of chromosomes during meiosis. Crossing over also accounts for genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical.

Detailed explanation-2: -Genetic recombinations provide a constant DNA homogenization within the species and, therefore, the species integrity as an elementary structure responsible for the preservation and rise in the level of ecological stability of organisms in evolving lineages.

Detailed explanation-3: -The exchange of chromosome material results in variation in the offspring. It plays a crucial function in the evolution process. The creation of genetic maps is aided by crossing over frequency. Crossing over is evidence of a chromosome’s linear organization of connected genes.

There is 1 question to complete.