Vapour theory of inheritance was put forward by:
A.Pythgorus
B.Aristotle
C.Graaf
D.None of these
Category: Basic Genetics Mcqs
Law of dominance states that:
A.Out of the two unit factors of contrasting expression of a trait present in an individual only one is expressed
B.Characters of parents are assorted independently during the gamete formation
C.Contrasting characters of parents are segregated at the time of gametogenesis
D.None of these things
The fact that F1 plants when backcrossed with double recessive parent gave four types of plants in equal proportions proves that the F1 plants produced:
A.Four type of gametes in equal number
B.Four types of gametes in ratio of 9:3:3:1
C.Two types of gametes in 3:1 ratio
D.Three types of gametes in 3:1:1 ratio
In monohybrid cross between tall (TT) and dwarf (tt) parents F2 plants produced in the ration of 3 tall : 1 dwarf are:
A.Only in phenotype
B.Only in genotype
C.Both (a) & (b)
D.None of these
In a monohybrid cross between red plants (RR) and white plant the F1 hybrids (Rr) are all pink. It is indication of the fact that gene R is:
A.Mutant
B.Recessive
C.Incompletely dominant
D.Hybrid
Mendel selected which of the following traits for his studies:
A.Stem length (tall or dwarf), flower position (apical or axial)
B.Flower colour (purple or white), seed shape (round or wrinkled)
C.Colour of pod (green or yellow), cotyledon colour (yellow or green)
D.All of these
Unit of inheritance is called :
A.Genotype
B.Phenotype
C.Gene
D.Chromosome
Branch of biology, which deals with the laws of heredity or similarities and dissimilarities between individuals related by descent, is called:
A.Genetics
B.Eugenics
C.Evolution
D.None of these
Out breeding in sheep produces improved strains of sheep which provide increased amount of meat and wool than in breeds. This is an example of:
A.Heterosis
B.Cross breeding
C.Inbreeding
D.All of these
Which of these terms indicate a pair of contrasting characters or factors:
A.Allele
B.Phenotype
C.Homozygous
D.Heterozygous
