Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Sexual Reproduction in Flowering Plants

Question:

Read the given passage and answer the questions that follow:-

Plant breeders aim to create new and improved varieties by crossing different species, and sometimes even genera, to combine desirable traits. To achieve successful crossbreeding, it is crucial to ensure that only the intended pollen grains are used for pollination, while also protecting the stigma from any unintended contamination. This careful selection and controlled pollination process help breeders create commercially superior varieties with specific traits.

What is the necessary step of removal of anthers from the floral bud( in the female plant bearing bisexual flowers) before the anther dehisces using a pair of forceps called?

Options:

Emasculation

Bagging

Cutting

Forcepping

Correct Answer:

Emasculation

Explanation:

The correct answer is Option (1): Emasculation

If the female parent bears bisexual flowers, removal of anthers from the flower bud before the anther dehisces using a pair of forceps is necessary. This step is referred to as emasculation. Emasculated flowers have to be covered with a bag of suitable size, generally made up of butter paper, to prevent contamination of its stigma with unwanted pollen. This process is called bagging. When the stigma of bagged flower attains receptivity, mature pollen grains collected from anthers of the male parent are dusted on the stigma, and the flowers are rebagged, and the fruits allowed to develop. If the female parent produces unisexual flowers, there is no need for emasculation. The female flower buds are bagged before the flowers open. When the stigma becomes receptive, pollination is carried out using the desired pollen and the flower rebagged.