The phenomenon, where a phenotype intermediate to the dominant and recessive type is obtained, is called
mixed dominance
major dominance
complete dominance
incomplete dominance
If a cross between two plants give 50% tall and 50% dwarf progeny, then the parents genotypes are
Tt x Tt
Tt x tt
TT x tt
TT x Tt
Mendelian recombinations are due to
linkage
mutations
dominant characters
independent assortment
The organisms phenotypically similar but genotypically different are said to be
multizygous
homozygous
heterozygous
monozygous
Three children in a family have blood types O, AB and B respectively. What are the genotypes of their parents?
IAIB and ii
IAi and IBi
IAIA and IBi
IBIB and IAIA
The most striking example of point mutation is found in a disease called
Thalassemia
Night blindness
Down's syndrome
Sickle cell anaemia
A family of five daughters only is expecting the sixth issue. The chance of its being a son is
Zero
25%
50%
100%
The transmission of certain genetic information from parents to offspring through cytoplasm is termed as
transformation
transduction
transversion
cytoplasmic inheritance
The recessive characters are expressed
on any autosome
on both the chromosomes of female
when they are present on X-chromosomes of male
when they are present on X-chromosomes of female
The basis for DNA fingerprinting is
occurrence of Restriction Fragment Length Polymorphism (RFLP)
phenotypic differences between individuals
availability of cloned DNA
knowledge of human karyotype
