A. Heterocyst
B. Hetropyenosis
C. Hypostasis
D. Epistastasis
Plant Breeding and Genetics
Presence of slight differences in identical twins support the hypothesis that……………….?
A. Single gene may produce multiple effects
B. Dominance may be incomplete
C. The environment effects the expression of genetic character
D. Genetic trails are influence by many genes
In a monohybrid cross, 2 heterozygous individuals were crossed, phenotypic ratio came to be (2:1), it is due to………………?
A. Dominant lethal genes in heterozygous individuals
B. Dominant lethal genes in homozygous individuals
C. Dominant epistasis
D. None of the above
The organic evolution look place about………………?
A. 100,000,000 years
B. 200,000,000 ears
C. 300,000,000 years
D. Still occurring
Which of the following had great influence on Drawing during during formulation of his theory of natural selection……………..?
A. Lamark’s idea on inheritance of acquired character’s
B. Mathis’s essay on population
C. Mendes’s experiment on pea
D. De Vries theory of mutation
Hereditary variations in plants have been produced by the use of…………….?
A. DDT
B. X-rays
C. Gibberrellic acid
D. Auxins
Red (RR) is crossed with white (ww). All the (Rw) offsprings are pink this is an indication that the R gene is……………..?
A. Recessive
B. Incomplete dominant
C. Mutant
D. Dominant
haploids are better for mutation studies because in them all the mutations whether recessive or dominant are expressed as……………?
A. There are many alleles of each gene in each call
B. There are two alleles of each gene in each cell
C. There is only one alleles of each gene present in each cell
D. Non3e4 of the above
After self pollination of red flowered plants out of 40 plants of progeny were white flowered. this indicates that the plants are………………?
A. Heterogeneous
B. Heterozygous
C. Homogenous
D. Homozygous