Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Differentiate between multiple allelism and pleiotropy with the help of an example of each.

Identify the statements as correct/ incorrect and give proper justification for your answer.

1. Zygote is the link between two generations.
2. Zygote is a single cell.
3. In organisms with haplontic life cycle, zygote divides by meiosis to form haploid spores.
4. In organisms with haplontic life cycle, zygote divides by mitosis to form haploid spores.

Why does biomagnification occur with certain substances? Name two such substances.

List four advantages that a symbiotic mycorrhizal association provides to the host plant.

Name the fluid which protects an embryo.

Give two examples of biofortified crops. What benefits do they offer to the society?

A childless couple has agreed for a test tube baby programme. List only basic stepsof the procedure that would involve to conceive a baby.

There is only one possible sequence of amino acids when deduced from a given nucleotides. But multiple nucleotides sequence can be deduced from a single amino acid sequence. Explain this phenomena

Describe the termination process of transcription in bacteria.