A few statements are given below followed by a set of terms in a box. Pick the correct term and write it against the appropriate statement
| (a) | Mating of closely related individuals within the same breed. | (i) | Cross |
|---|---|---|---|
| (b) | Mating of animals of same breed but having no common ancestors on either side for 4-6 generations. | (ii) | Inter-specific |
| (c) | Mating of animals of two different species. | (iii) | Outbreeding |
| (d) | Breeding of animals belonging to different breeds. | (iv) | Outcrossing |
| (v) | Inbreeding |
(a) Mating of closely related individuals within the same breed is called inbreeding.
(b) Mating of animals of same breed but having no common ancestors on either side for 4-6 generations is called outbreeding.
(c) Mating of animals of two different species is called interspecific hybridisation.
(d) Breeding of animals belonging to different breeds is called cross-breeding.
What is meant by 'hidden hunger'?
Consumption of food deficient in nutrients particularly, micronutrients, proteins and vitamins is called 'hidden hunger'.
Why are plants obtained by protoplast culture called somatic hybrids?
Plants obtained by protoplast culture are called somatic hybrids because they are formed by the fusion of isolated protoplasts from two different varieties of plants, each having a desirable character, to obtain a hybrid protoplast which can be further grown to form a plant.
What is protoplast fusion?
The ability of protoplasts obtained from two different cells to fuse and form a hybrid protoplast is called protoplast fusion.
Why is it easier to culture meristems compared to permanent tissues?
Meristems have the capacity to divide continuously throughout their life. Their walls are thin and elastic to facilitate the division, hence are suitable for tissue culture.
Permanent cells lose their ability to divide and their walls are thick. They have to differentiate to divide, hence are not easier to culture.