Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Given below is a figure of an ecosystem. Answer the following questions.

1. What type of ecosystem is shown in the figure.
2. Name any plant that is characteristic of such ecosystem.

Write a note on medicinal value of biodiversity.

Name four non-human organisms whose genomes have been sequenced.

i. Given below is a TS of an apple. Identify A, B, and C.

ii. Why is an apple categorised as a false fruit?

In garden pea plants, the green colour of the pod (G) is dominant over the yellow colour of the pod (g). To determine the genotype of a plant with an unknown genotype, use a Punnett square to show the genotypes and phenotypes in a test cross.

Sangeeta has developed a transgenic crop. She wants to grow this crop directly into the field. Will you allow her [2] to do so? What will you suggest her?

What is polyembryony and how can it be commercially exploited ?

Draw the chemical structure of molecule of morphine and cannabinoids.

Give the full form of ELISA. Which disease can be detected using it? Discuss the principle underlying the test.

In peas, tallness is dominant over dwarfness, and red colour of flowers is dominant over the white colour. When a tall plant bearing red flowers was pollinated by a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny.
Tall, Red = 138
Tall, White = 132
Dwarf, Red = 136
Dwarf, White= 128
Mention the genotypes of the two parents and of the types of four off springs. in numbers mentioned against them.