List of top Biology Questions asked in CBSE CLASS XII

When a cross in made between tall plants with yellow seeds (TtYy) and tall plant with green seed (TtYy), what proportions of phenotype in the offspring could be expected to be
(a) Tall and green.
(b) Dwarf and green.

Using a Punnett square, work out the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

Define and design a test - cross?

Explain the Law of Dominance using a monohybrid cross.

Draw a labeled diagram of a Graafian Follicle?

A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?

Describe the structure of a seminiferous tubule.

Draw a labeled diagram of male reproductive system.

Draw a labeled diagram of female reproductive system.

With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
 

With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte