Explanation: In human somatic cells the number of chromosomes present is 23 pairs. Related questions How does genetics relate to meiosis? How does genetics use the principles of probability? What are common mistakes students make with genetics? What are some examples of genetics? What is genetics? What is a common misconception about genes and heredity? What is the difference between a haplotype and a genotype?
One parental organism has the genotype "TT" , and another has the genotype "Tt". What will Are the 'alleles' same as the word homologous? What is polygenic inheritance? An autosome is one of the 22 numbered pairs of chromosomes that most of us carry in almost all of the cells of our body. We actually have a total of 23 pairs of chromosomes in these cells, for a total of 46 chromosomes, but two of those are referred to by letter rather than by number and are called sex chromosomes rather than autosomes, since they--that is the X and Y chromosome--help determine what sex, or gender, we are.
The 22 pairs of autosomes are referred to by number basically in inverse correlation with their size. That is, Chromosome 1, with the smallest number, is actually the largest chromosome. It has almost 3, genes on it. And we go down to the smallest chromosomes, the ones with the largest numbers.
You think that would be Chromosome 22, since we have Chromosomes 1 through 22, which only has about genes, but in fact Chromosome number 22 is not the smallest of the autosomes. We thought it was when it was first described, so that's how it got named It turns out that Chromosome 21 is actually a little bit smaller than Chromosome
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