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1.
Fifteen children from a class of 45 roll tongues. What percentage of the class are rollers?
25.3%
33.3%
35.3%
75.3%
2.
Which of the following blood groups in humans does not contain antigen?
A
O
B
AB
3.
Sickle-cell anaemia is an example of
sex-linkage.
blood grouping.
multiple alleles.
partial dominance.
4.
Which of the following scientists is associated with the study of inheritance?
Mendel
Linnaeus
Larmarck
Darwin
5.
DNA testing is used to determine
the sex of a baby.
whether twins will be born.
the father of a child.
when a baby is to be born.