Scientists use 3 key features to identify and read Human Chromosomes: Size: This is the most clear way to tell chromosomes apart. Banding pattern: Also called, Giemsa bands on the chromosomes make each pair unique. Centromere position: These are areas on chromosomes that look banded. They have … Continue reading
Tag Archives: Chromosome
The Human Genome
The human genome is the complete list of coded instructions needed to make a human.
~ There are 4 types of nucleotide base: A- adenine, T- thymine, C- cytosine, G- guanine.
~ The total number of human genes is estimated to be between 30,000 – 40,000.
~ Worms have 19,098 genes, fruit flies have 13,602 and yeast has 6,034.
~ The vast majority of the DNA in the genome (>97%) has no known function.
~ The functions remain unknown for over 50% of discovered genes.
~ Chromosome 1 has the most genes (2,968) and chromosome Y has the least (231).
~ There are 100 trillion cells in your body.
~ If unwound and tied together, the strands of DNA in one cell would stretch 6 feet.
~ 12,000 letters of DNA are decoded by human genome project computers every second.
~ The entire human genome requires more than 3 gigabytes of computer storage space.
~ To sequence the human genome, researchers collected a large number of blood samples from females and sperm from males. A few of these samples were then chosen at random for sequencing. The identities of the sample sources have never been disclosed, either to the donors or to the scientists.
