Variation and Inheritance( Genetics)

Important Questions on principle of inheritance and
variation
1. If a hybrid expresses a character, it is called _________

a-Epistasis

b-Dominant

c-Co-dominant

d-Recessive



2. A plant having the genotype AABbCC will produce ______ kinds of gametes

a-5

b-4

c-3

d-2



3. Colour blindness is an _________ linked recessive trait

a-Z chromosome

b-Y chromosome

c-X chromosome

d-None of the above



4. In most species, mitochondrial DNA is passed down from

a-DNA

b-Mother and Father

c-Father

d-Mother

, 5. Where are the genes for cytoplasmic male sterility in plants located?

a-Chloroplast genome

b-Mitochondrial genome

c-Cytosome

d-None of the above



6. _________ is a type of trait whose phenotype is influenced by more than one gene

a-Oncogenic Trait

b-Monogenic trait

c-Polygenic trait

d-None of the above



7. An individual’s collection of genes is called ______

a-Genotype

b-Phenotype

c-Trait

d-None of the above



8. A man marries a woman and both do not show any apparent traits of inherited disease. Five sons and
two daughters are born, and three of their sons suffer from a disease. However, none of the daughters is
affected. The following mode of inheritance for the disease is

a-Sex-linked recessive

b-Sex-linked dominant

c-Autosomal dominant

d-None of the above