Human Health and Disease — BIOLOGY STD 12 Science — Question

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.

Define aestivation.

What would be the growth rate pattern, when the resources are unlimited?

The ‘clown’ fish lives among the tentacles of sea anemone. What is this interaction between them called and why?

A3' ............ 5'B
C5’ ........... 3'D.
AB and CD represent two strands of a DNA molecule. When this molecule undergoes replication, forming a replication fork between A and C in the above.

1. Name the templete strand for replication.
2. Using which strand as the templete, will there be continuous synthesis of a complementary DNA strand
3. Complementary to which strand will okazaki segments get synthesised, discontinuous synthesis occurs.
4. What are templete strands and Okazaki pieces?
5. In which direction is a new strand synthesised?

Write a short note on ovaries.

State the respective ratio of given genetic phenomenon.

1. Complementary gene ratio.
2. Dihybrid test cross ratio.

Draw a digrammatic sketch of a dicot embryo and label any four parts including the reduced suspensor.

Define Lactation.

List the various markers that are used in DNA finger printing.