Autoradiogram of VNTR probe gives many band of different size. It diff...
Autoradiogram of VNTR probe gives many band of different size. It differs from individual to individual except monozygotic twins or identical twins.
View all questions of this testAutoradiogram of VNTR probe gives many band of different size. It diff...
Autoradiogram of VNTR probe gives many band of different size. It diff...
Answer:
The autoradiogram of a VNTR (Variable Number Tandem Repeat) probe is used to analyze genetic variation among individuals. VNTRs are repetitive DNA sequences that vary in length between individuals due to differences in the number of repeats. The autoradiogram shows the DNA fragments that result from the digestion of genomic DNA with a restriction enzyme and their separation by gel electrophoresis.
Explanation:
The autoradiogram of a VNTR probe typically shows multiple bands of different sizes, representing different alleles of the VNTR locus. These bands are a result of the presence of different numbers of repeats in the VNTR region. The number of repeats can vary significantly between individuals, leading to different band patterns on the autoradiogram.
The correct answer to the given question is option 'B' - Monozygotic twins or identical twins. Monozygotic twins are genetically identical as they result from the splitting of a single fertilized egg. Therefore, they will have the same number of repeats in the VNTR region, leading to identical band patterns on the autoradiogram.
Key Points:
- Autoradiogram of a VNTR probe shows bands of different sizes representing alleles of the VNTR locus.
- Different individuals have different numbers of repeats in the VNTR region, leading to different band patterns.
- Monozygotic twins are genetically identical and will have the same number of repeats, resulting in identical band patterns on the autoradiogram.
- Real sisters, heterozygotic twins, and real brothers can have different numbers of repeats, leading to different band patterns on the autoradiogram.