Foolish seedling disease of rice in Japan was caused by

• the deficiency of nitrogen

• a bacterium

• a fungus

• a virus

In rabbit, head of epididymis present at the head of the testis is called

• vas deferens

• cauda epididymis

• gubernaculum

• caput epididymis

Cleavage polyembryony occurs in

• Pinus

• Mini Cycas

• Cycas

• Ephedra

The embryo at 16 celled stage is known as

• morula

• gastrula

• blastula

• blastomere

Ozone depletion in stratosphere would result in

• forest fires

• global warming

• skin cancer incidence

• None of the above

Stop codons are

• AUG, GUG

• UAA, UGA, UAG

• UAC, UGG

• AGU, AGA, UAC

Jumping genes in maize were discovered by

• Hugo de Vries

• Barbara McClintock

• TH Morgan

• Mendel

Which of the following is a test cross ?

• Tt x tt

• TT x tt

• Tt x Tt

• tt x tt

1 : 2 : 1 phenotypic and genotypic ratio is found in

• complementary genes

• blending inheritance

• multiple alleles

• pseudo alleles

DNA multiplication is called

• translation

• replication

• transduction

• transcription