CELL STRUCTURES AND FUNCTION
CELL CYCLE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
n+n=2n
|
|
|
n=n
|
|
|
2n=n+n
|
|
|
2n=2n
|
Detailed explanation-1: -DNA and histone proteins are packaged into structures called chromosomes.
Detailed explanation-2: -In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
Detailed explanation-3: -The number of chromosomes does not correlate with the apparent complexity of an animal or a plant: in humans, for example, the diploid number is 2n = 46 (that is, 23 pairs), compared with 2n = 78, or 39 pairs, in the dog and 2n = 36 (18) in the common earthworm.
Detailed explanation-4: -The chromosomes unique structure has a few key parts. Each chromosome has two short arms called p arms and two long arms called q arms. These arms are held together at the center by the centromere. The tips of the chromosome are capped by sections of DNA called telomeres.