Biotechnology—Principles and Processes — BIOLOGY STD 12 Science — Question

Name all the haploid cells present in an unfertilised mature embryo sac of a flowering plant. Write the total number of cells in it.

Emasculation may not be necessary, yet bagging is necessary. Justify giving the condition when such a thing can happen.

Explain: amniocentesis

In order to obtain the F₁ generation, Mendel pollinated a true–breeding, say, tall plant with a true–breeding dwarf plant. But for getting the F₂ generation, he simply self-pollinated the tall F₁ plants. Why?

Differentiate incomplete dominance and co-dominance.

Draw a labeled diagram of a section through ovary.

Why are cloning vectors necessary in cloning? Name any two such vectors that are used in experiment with E. coli.

After a brief medical examination a healthy couple came to know that both of them are unable to produce functional gametes and should look for an 'ART' (Assisted Reproductive Technique). Name the 'ART' and the procedure involved that you can suggest to them to help them bear a child.

Draw a labeled diagram of male reproductive system.