Answer Posted / nagalakshmi
These are specific sequences in DNA of all
oranisms ,viruses which can get inserted to any other DNA.
So called as jumping genes discovered by by Barbara Mc
clintosh.They may be replicative /non replicative.They are
classified as composite ,Is Cut &paste .Retroposons
etc.They bring about mutation (frame shift )& also
oncogenic .some of the egs are LINES ,SINES In humans ,gal
genes in drosophila
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Cystic fibrosis (CF) occurs with a frequency of about 1/2500 Caucasian newborns and is inherited as an autosomal recessive. A woman had an older sister die from complications of this disease. CF is not present among relatives of her husband. Both the woman and her husband have normal phenotypes. What is the chance this couple will have a CF child