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Sex cells contain only 23 chromosomes, and they only reach the necessary 46 when they come together in a fertilized egg.
Slide 6 of 35...
Even more uncommonly, two "unzipped" chromosomes may come into contact - and zip back up, despite being two halves of different chromosomes!
Human Cells have a total of 46 chromosomes. But these 46 chromosomes come in pairs: each human somatic cell has 23 pairs of chromosomes.
Chromosomes Come in Pairs ... Human Cells have a total of 46 chromosomes. But these 46 chromosomes come in pairs: each human somatic cell has 23 pairs of chromosomes.
1. genetics paired: describes structurally identical homologous chromosomes that come together during cell division meiosis
1. genetics paired: describes structurally identical homologous chromosomes that come together during cell division meiosis
1. A pair of chromosomes made up of two homologs. Homologous chromosomes have corresponding DNA sequences and come from separate parents;
The normal diploid number for humans is 46. Only ½ of these chromosomes, or 23 can come from the unfertilized egg, the other 23 come from the sperm cell that fertilized it.
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