12. What are some examples
of phenotypical characteristics
that present two or more
varieties and of phenotypical
features that do not vary? In
relation to the genes
correspondent to those
characteristics that vary
among individuals what can
be expected about their
alleles?

Gap-fill exercise

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Colour of the eyes, of the hair, color
the skin, height, blood are
examples of phenotypical that
present two or varieties. Other
examples are colour of flowers and
in some plants, the of the
individual in species, etc.

Examples of characteristics
that do not variation among
individuals of same species are: in
the number of limbs,
anatomical position of the , the
general constitution of and cells,
etc.

Phenotype of presenting
natural variations ( beings of the same
) are necessarily determined by
or more different alleles the
correspondent gene. These
alleles combine and form
genotypes that condition the
phenotypes (variations).