Q3 of 53 Page 32

Enlist the steps of controlled cross pollination. Would emasculation be needed in a cucurbit plant? Give reasons for your answer.

Steps of controlled cross pollination are:

• Selection of parents with desired characters


• Protection of stigma from the contamination ( unwanted pollen grains ) by emasculation and bagging techniques


Emasculation is the removal of anther using forceps from bisexual flowers before the anther dehiscence. Cucurbits are monoecious (bisexual); having both male and female flowers on the same plant. Thus the chance of self pollination is very high. This can prevent the desired pollen from landing on stigma. Hence emasculation is needed in cucurbit plant for cross pollination.


More from this chapter

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1

What is the cross between the progeny of F1 and the homozygous recessive parent called? How is it useful?

 2

Do you think Mendel’s laws of inheritance would have been different if the characters that he chose were located on the same chromosome?

 4

A person has to perform crosses for the purpose of studying inheritance of a few traits / characters. What should be the criteria for selecting the organisms?

 5

The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes. Draw your conclusion on the basis of the pedigree.