Homozygous pure lines in cattle can be obtained by (a) mating of unrelated individuals of same breed (b) mating of individuals of different breed (c) mating of individuals of different species (d) mating of related individuals of same breed.
Select the mismatch. (a) Rhodospirillum – Mycorrhiza (b) Anabaena – Nitrogen fixer (c) Rhizobium – Alfalfa (d) Frankia – Alnus
A disease caused by an autosomal primary non disjunction is (a) Klinefelter's syndrome (b) Turner's syndrome (c) sickle cell anaemia (d) Down's syndrome.
Spliceosomes are not found in cells of (a) fungi (b) animals (c) bacteria (d) plants.
DNA fragments are (a) negatively charged (b) neutral (c) either positively or negatively charged depending on their size (d) positively charged.