47 is the term for number of chromosomes for body except gametes 46 chromosomes.
47 is the term for number of chromosomes for body except gametes 46 chromosomes.
term for number of chromosomes for body except gametes 46 chromosomes?
47
diploid cells have two homologous copies of each chromosome, usually one from the mother and one from the father. all or nearly all mammals are diploid organisms. the suspected tetraploid (possessing four chromosome sets) plains viscacha rat ("tympanoctomys barrerae") and golden vizcacha rat ("pipanacoctomys aureus") have been regarded as the only known exceptions (as of 2004). however, some genetic studies have rejected any polyploidism in mammals as unlikely, and suggest that amplification and dispersion of repetitive sequences best explain the large genome size of these two rodents. all normal diploid individuals have some small fraction of cells that display polyploidy. human diploid cells have 46 chromosomes (the somatic number, "2n") and human haploid gametes (egg and sperm) have 23 chromosomes ("n").
ploidy
like all cells, somatic cells contain dna arranged in chromosomes. if a somatic cell contains chromosomes arranged in pairs, it is called diploid and the organism is called a diploid organism. (the gametes of diploid organisms contain only single unpaired chromosomes and are called haploid.) each pair of chromosomes comprises one chromosome inherited from the father and one inherited from the mother. for example, in humans, somatic cells contain 46 chromosomes organized into 23 pairs. by contrast, gametes of diploid organisms contain only half as many chromosomes. in humans, this is 23 unpaired chromosomes. when two gametes (i.e. a spermatozoon and an ovum) meet during conception, they fuse together, creating a zygote. due to the fusion of the two gametes, a human zygote contains 46 chromosomes (i.e. 23 pairs).
somatic cell