Genes are individual segments of DNA and chromosomes are structures which contain many genes packed together. Each chromosome contains one DNA molecule and each DNA molecule contains several genes or individual strands.Know More
Genes are the basic unit in the study of genetics. Each gene contains the specific code relating to the function of a single protein. Genes combine to form specific DNA molecules. The nucleus of the cell of an organism contains chromatin, which is complex combination of proteins and DNA. When cell division occurs during reproduction, the chromatin forms with the DNA into a chromosome.
In a chromosome, the DNA is tightly packed together with histone proteins. If all the DNA strands in the human body were laid end to end, they would form a very thin strand about 6 billion miles long. The complexity of the organism usually predicts the number of genes and chromosomes. A frog, for example, has 26 chromosomes, or 13 pairs, while a human being has 46 chromosomes, or 23 pairs. Human chromosomes range from 300 genes to 8,000 genes in size.
Chromosomes are paired as the offspring receives one from each parent. Chromosomes and sometimes their combination in the pair determine all inherited characteristics, including sex. For instance, two X chromosomes will produce a female baby while an XY combination will produce a male baby.Learn more about Molecular Biology & DNA
Chromosomes are paired long chains within a cell nucleus that are composed of genes (about 20,000 genes per chromosome pair), which are made up of the chemical substance called DNA. Genes on the chromosomes are made of segments of DNA which contain chemically coded messages resulting in the characteristics of an organism — including humans.Full Answer >
Chromosomes are made of a protein surrounded by a double-stranded nucleic acid called DNA. DNA contains genetic information that provides instructions to the cells for carrying out bodily functions.Full Answer >
Chromosomes are composed of deoxyribonucleic acid strands made of gene combinations. All DNA strands consist of nucleotides, composed of a nitrogenous base, a molecule of sugar and a molecule of phosphoric acid. Specific combinations of the nitrogenous bases are gene codes that present as hereditary characteristics.Full Answer >
Chromosomes were first discovered in 1842 by the Swiss botanist Karl Wilhelm von Nageli. The name "chromosomes," meaning "colored bodies," was coined by Edouard van Beneden in 1888.Full Answer >