A pea with white flower was crossed with another pea with white flower. When they selfed, the F2 generation produced purple and white in the ratio of 9:7. The reason for the result is that
it is typical monohybrid Mendelian ratio
purple flower colour is dominant over white
it is a complementary factor
None of the above
C.
it is a complementary factor
Complementary genes are the exception of Mendelian inheritance, in which two gene combinely produce a phenotype, which is not coded or expressed by a gene or allele alone.
The organisms that thrives on the remains of dead plants and animals are categorised as
carnivore
omnivore
scavangers
predators
In which of the following, determination of order of bases in a DNA molecule takes place
Gene probing
Gene splicing
Gene mapping
Gene sequencing
Water pollution is best assessed by determining
DO and BOD
BOD and turbidity
DO and acidity
Hardness and alkalinity
Tumour promoter is
substance that activates transcription in cancer cells
oncogene promoting cancer
substance that produces tumour
All of the above
Host cells in response to viral infections produces a low molecular weight protein, that protect other cells against further viral infection. This substance is
phytotoxin
antibody
hormone
interferon
Which of the following statement is not true about Griffith's experiment?
The experiment was conducted in 1928
The experiment occurs with Streptococcus pneumoniae
R and S-strain of bacteria
The experiment proves the process of transduction
Who formulated the chromosomal theory of linkage
T H Morgan and W Castle
Stern and Hotta
Pontecarvo
Bridges and Burns
A natural form of genetic engineering is exhibited by
Haemophilus influenzae
E.coli
Dolly
Agrobacterium tumefaciens
Which one of the given statement is not true for Archaeopteryx?
Each wing had three clawed digit
Hind feet with five digits
Long jointed lizard like tail
Thecodont teeth on both jaws
