In ABO blood group system, a single gene with multiple alleles produces four phenotypes; which type/s of trait it is?
a) qualitative
b) quantitative
c) both a and b
d) none of them
Explanation: they show discontinuous variations i.e. A, B, AB and O show distinct variations
In 4 O’ clock flower, a single gene with multiple alleles produces three phenotypes; which type/s of trait it is?
a) qualitative
b) quantitative
c) both a and b
d) none of them
Explanation: they show discontinuous variations i.e. red pink and white color show distinct variations
A continuously varying trait is encoded by alleles……gene pair/s at….locus/loci.
a) one---‑same
b) two or more----same
c) two---same
d) two or more---different
Explanation: these genes influencing the same trait in an additive way
Polygenic inheritance forms the basis of
a) complete dominance
b) discontinuous variation
c) incomplete dominance
d) continuous variation
Explanation: Continuous variation refers to a characteristic that can have many different values and take on any value within that range. An example of this is human height. There is no fixed point at which someone becomes short or tall.
Which of the
following traits are called polygenic traits?
a) qualitative
b) quantitative
c) both a and b
d) none of them
Explanation: they show continuous variations
Polygene controls………trait.
a) qualitative
b) quantitative
c) both a and b
d) none of them
Explanation: they show continuous variations
