cbse 10th science sample question paper with answers

Asked: December 26, 2023In: Class 10 Science

Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation. a. What will be set of genes present in the F1 generation? B. Give reason why only tall plants are observed in F1 progeny c. When F1 plants were self – pollinated, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F 2 generation.

Genes follow inheritance patterns such as autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. These patterns dictate how traits are passed from one generation to the next.

Rajshree Chatterjee

Asked: December 26, 2023In: Class 10 Science

Gas A, found in the upper layers of the atmosphere, is a deadly poison but is essential for all living beings. The amount of this gas started declining sharply in the 1980s. a. Identify Gas A. How is it formed at higher levels of the atmosphere? b. Why is it essential for all living beings? State the cause for the depletion of this gas.

The upper layers of the Earth’s atmosphere, including the thermosphere and exosphere, extend beyond the mesosphere. They contain sparse air molecules and play a crucial role in phenomena like auroras.