Human Reproduction — BIOLOGY STD 12 Science — Question

1. Sickel-cell anaemia in humans is a result of point mutation. Explain.
2. Write the genotypes of both the parents who have produced a sickle-cell anaemic offspring.

Name the three layers of uterine wall.

The traits are inherited through generations. This fact is based on the principles proposed by Gregor Mendel in 1865. However, Mendel did not discover these principles of inheritance by studying human beings, then how his principles are applied in case of humans.

Write a note on cultural and religious importance of biodiversity Which type of conservation measures, in situ or ex-situ will help the larger number species to survive? Explain.

Where does fertilization take place in human female?

1. State how the constant internal environment is beneficial to organisms
2. Explain any two alternatives by which organisms can overcome stressful external conditions.

The below image shows is the headquarter of Eli Lilly company. Eli lily is one of the first pharmaceutical companies to produce human insulin using RDT technology by cell-based fermentation method.

i. How did Eli Lilly synthesize human insulin?
ii. Mention one difference between this insulin and the one produce by the human pancreas.

To which product, following projects are related?

1. Blue revolution.
2. White revolution.
3. Green revolution.

1. Identify the polarity at A and B respectively in the figure given below.
2. Explain the mechanism the figure represents.

Study the diagram given below:
Name the linkages X, Y, Z and the respective molecules formed by them.