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Question: the african clawed frog xenopus laevis has nearly double the...

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The African clawed frog, Xenopus laevis, has nearly double the number of chromosomes as the closely related Western clawed frog, Xenopus tropicalis. The X. laevis genome consists of two distinct sets of chromosomes, each descended from a unique ancestral species . Retinoblastoma is a form of cancer that can be caused by a missing or defective RB1 gene, which is located at the end of human chromosome13. Some children are born with a chromosome 13 deletion that makes them much more likely to develop retinoblastoma that children born without the deletion Single nucleotide polymorphisms (SNPs) are heritable differences in DNA sequence that may or may not affect the function of a protein. Millions of different SNPs have been identified in the human genome. Some SNPs help predict an individuals response to certain drugs and susceptibility to environmental factors such as toxins The above are both examples of genetic.

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