What are the phenotypes of the parent of a colour-blind son and non-carrier daughter with normal colour vision?
Father Mother
a) carrier normal
b) colour-blind carrier
c) normal carrier
d) normal colour-blind
Explanation: parents genotypes XcY and XCXc
When expression of a biological character is observed in variable intensity it is due to the effect of……..
a) multiple alleles
b) Co-dominance
c) epistasis
d) polygenic inheritance
Explanation: Polygenic inheritance refers to the inheritance of a trait governed by more than one genes.
Inheritance of skin colour in man is controlled by eight pairs of genes. Which are………….
a) linked
b) Co-dominant
c) multiple alleles
d) assorting independently
