OBJECTIVE LIFE SCIENCE
GENETICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
gene
|
|
|
chromosome
|
|
|
trait
|
|
|
DNA
|
Detailed explanation-1: -The correct answer is: Chromosome.
Detailed explanation-2: -A chromosome is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. The chromosomal DNA is wound around histones (highly alkaline DNA-bound proteins) which serve as a spool to package the DNA and control its functions.
Detailed explanation-3: -A chromosome is formed from a single, enormously long DNA molecule that contains a linear array of many genes. The human genome contains 3.2 × 109DNA nucleotide pairs, divided between 22 different autosomes and 2 sex chromosomes.
Detailed explanation-4: -The entire structure is called a nucleosome, each of which includes an octamer of histone proteins and 146 to 147 base pairs of DNA. [2][3] The millions of nucleosomes tightly coil the continuous DNA strand into chromatin which is further condensed into the chromosome classically visualized during cell division.