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Generally speaking, they come from the same place as other nucleotides, that make up the DNA and RNA of nuclei. They are formed in the Ribosomes of a cell, which use RNA to decide what sort of polypeptides/proteins to create, and (by extension) the nucleotides that make up the RNA.
Water is constantly moving, but major currents in the ocean are the result of the wind which drags on the surface of the water as it blows.
There was less of it, making it more possible for the species to be extinct.
Sleep apnea option 3 is the correct answer .....I guess gotta check
This is due to the fact that only homologous chromosomes would have identical genes located at identical sites on those chromosomes. Otherwise, there would be no connection between the alleles of various genes.
Although the genes and loci of the two members of the homologous pair are similar, the alleles may vary.For instance, both allele possess the genes responsible for the attribute of eye colour. While the one has alleles for the blue-eye trait, other has alleles for the brown-eye trait. The homologous chromosomes are said to be heterozygous in this instance since the alleles are different.
On the other hand, when both alleles for a gene that codes for the blue-eye phenotype are present, it is said to be homozygous.
To learn more about homologous chromosomes click here
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