Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Expand GPP and NPP. Differentiate between the two.

Explain two situations, when independent assortment of genes occur, resulting in 50% recombinants.

What is secondary metabolism?

Two independent monohybrid crosses were carried out involving a tall pea plant with a dwarf pea plant. In the first cross, the offspring population had equal number of tall and dwarf plants, whereas in the second cross it was different. Work out the crosses, and explain giving reasons for the difference in the offspring populations.

OR

Work out a cross to find the genotype of a tall pea plant. Name the type of cross.

How do 'implants' act as an effective method of contraception in human females? Mention its one advantage over contraceptive pills.

Name the first transgenic cow. Which gene was introduced in this cow?

How did Eli Lilly synthesise the human insulin? Mention one difference between this insulin and the one produced by the human pancreas.

List the events that lead to biogas production from waste water whose BOD has been reduced significantly.

Consuming curd keeps the gastrointestinal tract intact. Give reason.

Compare and contrast the advantages and disadvantages of production of genetically modified crops.