HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions

What are psychoactive drugs? Add a note Marijuana and Opium

What are the King and Queen of spices? Explain about them and their uses.

How will you prepare an organic pesticide for your home garden with the vegetables available from your kitchen?

Fruit colour in squash is an example of

The epistatic effect, in which the dihybrid cross 9:3:3:1 between AaBb Aabb is modified as

“Gametes are never hybrid”. This is a statement of

Gene which suppresses other genes activity but does not lie on the same locus is called as

Pure tall plants are crossed with pure dwarf plants. In the F₁ generation, all plants were tall. These tall plants of the F₁ generation were selfed and the ratio of tall to dwarf plants obtained was 3:1. This is called

The dominant epistatis ratio is

What are multiple alleles?

Differentiate incomplete dominance and codominance.

Describe dominant epistasis with an example.

Bring out the inheritance of the chloroplast gene with an example.

Extra nuclear inheritance is a consequence of the presence of genes in

What is meant by cytoplasmic inheritance?

Identify the correctly matched pair

A Plant called X possesses small flower with reduced perianth and versatile anther. The probable agent for pollination would be

Consider the following statement(s)

1. In Protandrous flowers, pistil matures earlier
2. In Protogynous flowers, pistil matures earlier
3. Herkogamy is noticed in unisexual flowers
4. Distyle is present in Primula

What is reproduction?

What are clones?