What is present on the outside of double helix?

nitrogenous base
phosphate-sugar backbone
nucleotides
ribose sugar
nucleotides  

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The allele which is not expressed is called
A. recessive allele
B. dominant allele
C. loci
D. phenotype
The notable work of Gregor Mendel is the development of principles of
A. genetics
B. skeletal structure
C. muscular structure
D. DNA structure
If two different alleles of a gene pair express themselves completely is called
A. incomplete dominance
B. co dominance
C. complete dominance
D. Recessiveness
ABO blood group is controlled by gene
A. M
B. N
C. I
D. AB
Evolutionary changes are always
A. non inherited
B. inherited
C. dominant
D. recessive
The bred animals are known as breeds and bred plants are
A. products
B. cultivars
C. species
D. offsprings
The scientific name of peas is
A. pisum sativum
B. prunus amygdalus
C. malus domestica
D. maclura pomifera

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