The restriction fragment shown below contains a gene whose recessive allele is lethal. The normal allele has restriction sites for enzymes \[BamI\]at sites I and II whereas recessive allele lacks site I. An individual who has a sister with the lethal trait is being tested to determine if he is a carrier of that lethal trait. |
Which of the band patterns would be produced on a gel if he is a carrier? |
A)
B)
C)
D)
Correct Answer: D
Solution :
Normal allele |
A carrier individual will have both the alleles- normal and recessive alleles. When digested with\[BamI\], total five fragments (3 fragments from normal allele of different sizes and 2 fragments of the same size from recessive allele) will be obtained in the gel. |
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