(UNIT: 8 Inheritance Biology )
1. Type of genotype in individual having blood group B will be (June 2006)
a) IA Iob) IAIBc) Io Iod) IB Io
2. Which is observed after crossing over between chromosomes having pericentric inversion and normal (June 2006)
a) Segmental Deletion and duplicationb) Bridge formationc) Ring formationd) Acentric and dicentric chromosomes
3. If a gene product in Species A is 90% similar to gene product in Species B. Such genes are termed as(June 2006)
a) Orthrologousb) Paralogousc) Allologousd) Perilogous
4. Interspecific hybrids have proved very useful for (June 2006)
a) Gene mappingb) Genetic manipulationc) Gene structured) Gene function
5. Albinos have visual problem in bright light because they lacks (June 2006)
a) Melaninb) Rodsc) Conesd) Creatin
6. The F+ segment of bacteria may be transferred to F- bacteria by the process of (June 2006)
a) Conjugationb) Transductionc) Transformationd) Fragmentaion
7. In a genetic test 9:7 ratio in F2 generation represents (June 2006)
a) Epistasisb) Co-dominancec) Incomplete dominanaced) Complete dominance
8. If inheritance of disease to next generation is only possible through females. The probable inheritance is (Dec2006)
a) Sex-linkedb) Mendelianc) Organellard) Autosomal
9. Among the following Mendelian inheritance is obeyed by (Dec2006)
a) Quantitative traitsb) Transposonsc) organellesd) gene for vertical transfer of disease
10. If mutation changes codon in such a way that there is no effect on functioning and overall structure of protein. This type of mutation is termed as (June 2007)
a) Silentb) Mis sensec) Transitiond) Frame shift
11. Considering the following pedigree chart (June 2008)
a) X linked dominantb) Autosomal dominantd) Autosomal recessive
12. Genetic disorder Xeroderma pigmentosum is due to error in (Dec 2008)
a) base excision repair mechanismc) nucleotide excision repair mechanismd) DNA replication mechanism
13. The following pedigree represents the inheritance of a rare disorder. Based on the above pedigree, what is the most likely mode of inheritance? (Dec 2008)
a) X linked dominantb) Autosomal dominantc) X linked recessived) Autosomal recessive
14. Quantitative inheritance defines (Dec 2008)
a) variation in phenotypeb) variation in genotypesc) variation in genesd) variation in environment
15. A mother of blood group O has a group O child, the father could be of blood type
a) A or Bb) AB onlyc) O onlyd) A or B or O
Answers
1. IB Io
2.a) Segmental Deletion and duplication
Related key points:
- crossing over between chromosome having pericentric inversion and normal=segmental deletion and duplication
- crossing over between chromosome having paracentric inversion and normal=acentric and dicentric chromosomes
3. a) Orthrologous
- Orthologs are genes that are related by vertical descent from a common ancestor and encode proteins with the same function in different species.
- Paralogs are homologous genes that have evolved by duplication and code for protein with similar, but not identical functions.
4. a)Gene mapping
5.a) Melanin
6.a) conjugation
7.a) epistasis
8.c) Organellar
9. d) gene for vertical transfer of disease
- vertical gene transfer: transfer of DNA from parent to offspring during normal cell division
- horizontal gene transfer is transfer of DNA between genomes; very common in bacteria.
10.a) Silent
11. b) Autosomal dominant
12.c) nucleotide excision repair mechanism
13.d) Autosomal recessive
14.b) variation in genotypes
Quantitative inheritance / Multiple factor / Polygenic inheritance / Multiple factor / Cumulative inheritance
15. d) A or B or O
mother: O blood group= Io IoChild : O blood group= Io Io
Blood group of father?
Here one allele Io comes from mother and the other from the father, ie. father can be IA Io, IB Io, Io Io
Ans: A or B or O
More about: ABO Blood group
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