Which of the following allele/s of three different genes is/are responsible for the production of dark-skin colour?
a) A
b) B
c) C
d) all of these
Explanation: A, B and C alleles show positive effects in production of dark skin colour
Which of the following allele/s of three different genes is/are responsible for the production of light-skin colour?
a) a
b) b
c) c
d) all of these
Explanation: a, b and c alleles show negative effects in the production of light skin colour
Which of following genotype will produce very dark skin phenotype in human?
a) AABBCC
b) aabbcc
c) AaBbCc
d) AAbbCc
Which of following genotype will produce very light skin phenotype in human?
a) AABBCC
b) aabbcc
c) AaBbCc
d) AAbbCc
The cross between AABBCC(black) and aabbcc (white) will produce………
a) black
b) white
c) mulatto
d) all of these
Explanation: mulatto is an offspring of black and white with intermediate skin colour i.e. light brown
The cross between mulatto male with mulatto female genotype will produce …….different phenotypes.
a) one
b) two
c) three
d) seven
Explanation: the ratio will be, 1 dark brown, 6 moderately dark brown, 15 brown, 20 light brown, 15 pinkish brown, 6 whitish brown and 1 pure white
