Exercise:
Which of the following is a continuous variation in humans?
a) tongue rolling
b) ABO blood group
c) intelligence
d) free or attached earlobes
The chromosomes are chemically composed of
a) DNA and carbohydrate
b) DNA and protein
c) protein and lipids
d) DNA and lipids
Which of the following is not the component of nucleotide?
a) genes
b) deoxyribose
c) phosphate group
d) nitrogenous base
Which of the following makes a difference of meiosis from mitosis?
a) the appearance of chromosomes at prophase
b) crossing over
c) spindle fibers formation
d) cytokinesis
For each biological trait there is a………
a) nucleotide
b) chromosome
c) cell
d) gene
