In the nucleus of each cell, the dna molecule is packaged into thread-like structures called chromosomes each chromosome is made up of dna tightly coiled many times around proteins called histones that support its structure chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. Dna, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms nearly every cell in a person’s body has the same dna most dna is located in the cell nucleus (where it is called nuclear dna), but a small amount of dna can also be found in the mitochondria.
Genes are packaged in bundles called chromosomes humans have 23 pairs of chromosomes, resulting in 46 individual chromosomes of those pairs, one pair, the x and y chromosome, determines whether you are male or female, plus some other body characteristics females have an xx pair of chromosomes while men have a pair of xy chromosomes.
The dna in the human y chromosome is composed of about 59 million base pairs the y chromosome is passed only from father to son with a 30% difference between humans and chimpanzees, the y chromosome is one of the fastest-evolving parts of the human genome to. Looking at chromosome 1, you can see that i match cheryl and don on the same segment at the beginning of the chromosome, but received two different segments of dna on a different portion of chromosome 1, further to the right. Of those pairs, one pair, the x and y chromosome, determines whether you are male or female, plus some other body characteristics females have an xx pair of chromosomes while men have a pair of xy chromosomes. Chromosomes are a key part of the process that ensures dna is accurately copied and distributed in the vast majority of cell divisions still, mistakes do occur on rare occasions changes in the number or structure of chromosomes in new cells may lead to serious problems.
Dna, genes, chromosomes the building blocks of inheritance dna (deoxyribonucleic acid) is a biomolecule that holds the blueprint for how living organisms are built. Simply defined, a chromosome is a cell that, has shown in the picture above, contains protein and one dna molecule that is found in the nucleus of the cell.
A chromosome (/ ˈ k r oʊ m ə ˌ s oʊ m, -ˌ z oʊ m / from ancient greek: χρωμόσωμα, chromosoma, chroma means colour, soma means body) is a dna molecule with part or all of the genetic material of an organism. The virtual genetics education centre, created by the university of leicester, offers additional information on dna, genes, and chromosomes an overview of mitochondrial dna is available from the neuromuscular disease center at washington university. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (dna) passed from parents to offspring, dna contains the specific instructions that make each type of living creature unique.
A chromosome is an organized package of dna found in the nucleus of the cell different organisms have different numbers of chromosomes humans have 23 pairs of chromosomes--22 pairs of numbered chromosomes, called autosomes, and one pair of sex chromosomes, x and y.