Human Health and Disease — BIOLOGY STD 12 Science — Question

Describe how biotechnology has helped in producing more nutritionally balanced milk. Write the full forms of the following:

1. GEAC
2. PKU

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.

How does colostrum provide Initial proteitton agannt diseases to newborn infants? Give one reason.

Find out the role of microbes in the following and discuss it with your teacher.
Single cell protein (SCP)

List the key tools used in recombinant DNA technology.

Explain any one use of biotechnology in medicine.

What do you mean by hotspots of bio-diversity? What are evidences for identity of hot spots? Write two Indian hotspots.###What is biodiversity hotspot? Write down the name and species diversities of two such hot spots found in India.

How is Rhizobium promotes the yield of legume crop?

Draw a vertical section of maize grain and label any three embryonic and three other parts.

Spermatids possess haploid chromosome number. Explain.