Using your phone's internet browser
go to:  qna.rediff.com
Click and drag this link to
the Home icon in your browser.
Q.

What is double fertilisation ?

Tags: double fertilisation, pregnancy & parenting
Asked by right sense, 28 Mar '13 07:15 pm
  Invite a friend  |  
  Save  |  
 Earn 10 points for answering
Answer this question  Earn 10 points for answering    
4000 characters remaining  
  
    
Keep me signed inNew User? Sign up

Answers (5)

 
1.

Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm). It begins when a pollen grain adheres to the stigma of the carpel, the female reproductive structure of a flower. The pollen grain then takes in moisture and begins to germinate, forming a pollen tube that extends down toward the ovary through the style. The tip of the pollen tube then enters the ovary and penetrates through the micropyle opening in the ovule. The pollen tube proceeds to release the two sperm in the megagametophyte.One sperm fertilizes the egg cell and the other sperm combines with the two polar nuclei of the large central cell of the megagametophyte. The haploid sperm and haploid egg combine to form a diploid zygote, while the other sperm and the two haploid polar nuclei of the large central cell of the megagametophyte form a triploid nucleus ( ...more
Source: wikipedia
Answered by Josna, 28 Mar '13 07:27 pm

 
  
Report abuse
Useful
 (1)
Not Useful
 (0)
Your vote on this answer has already been received
2.

Two sp*erm enter same e*gg.
Answered by Maha Rani, 28 Mar '13 07:17 pm

 
  
Report abuse
Useful
 (2)
Not Useful
 (1)
Your vote on this answer has already been received
3.

Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms).
Answered by Quest, 29 Mar '13 01:22 pm

 
  
Report abuse
Useful
 (1)
Not Useful
 (0)
Your vote on this answer has already been received
4.

Wiki says - Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm)
Answered by conviction, 02 Apr '13 06:37 pm

 
  
Report abuse
Useful
 (0)
Not Useful
 (0)
Your vote on this answer has already been received
5.

The process in which the two sperm nuclei of a pollen grain unite with nuclei of the embryo sac of an angiosperm plant.
Answered by saranathan Narasimhan, 01 Apr '13 03:02 pm

 
  
Report abuse
Useful
 (0)
Not Useful
 (0)
Your vote on this answer has already been received

Ask a Question

Get answers from the community

600 characters remaining