Both alleles independently expressed in the heterozygote d) One allele dominant on the other . Pick out the correct statements: [NEET-I, ] a) Haemophilia is a sex-linked recessive disease b) Down’s syndrome is due to aneuploidy c) Phenylketonuria is an autosomal recessive gene disorder d) Sickle cell anaemia is an X-linked recessive gene disorder XII Std Zoology Competitive Questions XII Std Zoology Competitive Questions MCQs for Higher Studies a) A and D are correct b) B and D are correct c) A,C and D are correct d) A,B and C are correct Chapter - Molecular Genetics . The association of histone H1 with a nucleosome indicates (NEET ) a) Transcription is occurring b) DNA replication is occurring c) The DNA is condensed into chromatin fibre d) The DNA double helix is exposed . Which of the following is not required for any of the techniques of DNA fingerprinting available at present?
[NEET ] a) Zinc finger analysis b) Restriction enzymes c) DNA-DNA hybridization d) polymerase chain reaction . Satellite DNA is important because it [AIPMT ] a) codes for proteins needs in cell cycle b) shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children c) Does not code for protein and is same in all members of the population. d) Codes for enzymes needed for DNA replication. .
The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C. (NEET ) A B C DNA ----→mRNA ---------→protein -proposed by--- a) A- trancscription, B- replication C-James Watson b) A- trancscription, B- trancscription, C-Erwin c) A- trancscription, B- tranlation, C-Francis Crick d) A- trancscription, B- extension, C-Rosalind Frankin . Select the two statements out of the four (I –IV) given below about lac operon.
[AIPMT ] i. Glucose or galactose may bind with the repressor and inactive it. ii. In the absence of lactose, the repressor binds with the operator region iii.
The z-gene codes