Home
Class 12
BIOLOGY
For the formation of 40 embroyes, how ma...

For the formation of 40 embroyes, how many meiotic divisions, in all are required?

A

40

B

50

C

60

D

80

Text Solution

Verified by Experts

The correct Answer is:
A
40 divisons are required to produce 40 embryo sacs from 40 megaspores. Megaspore mother cell divide reductionally, it produces 4 megaspores. In monosporic development, three megaspores degenerate. In bisporic type development two megasproe nuclei degenerate and two remain functional. In tetrasporic nuclei degenerate and two remain functional. In testrasporic type development, all the four megaspore nuclei remain functional but in all these three cases only one embryo sac is produced. Hence, for 40 embryo sacs, 40 reductional divisons are required.
Promotional Banner

Topper's Solved these Questions

  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    GRB PUBLICATION|Exercise Embryogenesis|8 Videos

  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    GRB PUBLICATION|Exercise Endosperms|19 Videos

  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    GRB PUBLICATION|Exercise Microgametogenesis|24 Videos

  • REPRODUCTIVE HEALTH

    GRB PUBLICATION|Exercise Assertion -Reason Type Questions|36 Videos

  • THE GENETIC MATERIAL

    GRB PUBLICATION|Exercise DNA REPLICATION|136 Videos

Similar Questions

Explore conceptually related problems

For the formation of 50 seeds, how many minimum meiotic divisions are necessary ?

For formation of 50 seeds, how many minimum meiotic divisions are necessary?

For the formation of 32 spermatide, meiotic division occurs in cells

Ques no. 8 : For the Formation of 140 angiospermic seeds how many meiotic cell divisions are expected?

To produce 102 pollen grains, how many meiotic divisions are required ?

How many meiotic divisions are required to produce 200 seeds ?

How many meiotic divisions are necessary to form 200 seeds?