Problem

Solutions For An Introduction to Genetic Analysis Chapter 14 Problem 32P

Step-by-Step Solution

Solution 1

The sequence contigs from a genomic clone of the human species would be:

Read1: ATGCGATCTGTGAGCCGAGTCTTTA

Read2: AACAAAAATGTTGTTATTTTTATTTCAGATG

Read3: TTCAGATGCGATCTGTGAGCCGAG

Read4: TGTCTGCCATTCTTAAAAACAAAAATGT

Read5: TGTTATTTTTATTTCAGATGCGA

Read6: AACAAAAATGTTGTTATT

The reads can be written in an overlapping way:

ATGCGATCTGTGAGCCGAGTCTTTA

AACAAAAATGTTGTTATTTTTATTTCAGATG

TTCAGATGCGATCTGTGAGCCGAG

TGTCTGCCATTCTTAAAAACAAAAATGT

TGTTATTTTTATTTCAGATGCGA

AACAAAAATGTTGTTATT

a. The sequence contig of this part of H.sapiens genome is

5'TGTCTGCCATTCTTAAAAACAAAAATGTTGTTATTTTTATTTCAGATG CGATCTGTGAGCCGAGTCTTTA 3'

There are two possible transcripts as the DNA sequence can represent the template strand or the complimentary strand. The two strands are:

5'UGUCUGCCAUUCUUAAAAACAAAAAUGUUGUUAUUUUUAUUUCAGAUGCGAUCUGAGCCGAGUCUUUA-3'

and

3'ACAGACGGUAAGAAUUUUUGUUUUUACAACAAUAAAAAUAAAGUCUACGCUAGACACUCGGCUCAGAAAU5'

b. Translating the sequence contig in all possible reading frames. There are 6 reading frames. They are:

Translation of first transcript:

Frame 1starting at first letter CLPFLKTKMLLFLFQMRSVSRVF

Frame2 starting at second letter VCHS Stop

Frame 3starting at third letter SAILKNKNVVIFISDAICRPSL

Translation of second transcript:

Frame 4 starting at the first letter reads Stop

Frame5starting at the second letter reads KDSAHRSHLK stop

Frame6starting at the third letter reads KTRLTDRI stop

c. When we run the above nucleotide sequence of the contigs in BLASTn search, or if we use the translated sequence in tBLASTn search, we can find that this sequence given above is a perfect match with a specific region of the human genome. A region of the 19th exon of the CFTR gene matches correctly with the above sequence.

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