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  • Need explanation for: A change in the amount of yolk and its distribution in the egg will affect

A change in the amount of yolk and its distribution in the egg will affect

  • Option 1)

    pattern of cleavage

  • Option 2)

    number of blastomeres produced

  • Option 3)

    fertilization

  • Option 4)

    formation of zygote

 

Answers (1)

As we discussed in concept

Cleavage -

The mitotic division or cleavage starts as the zygote moves through the isthmus of the oviduct towards the uterus and forms 2, 4, 8, 16 daughter 
cells. The embryo with 8 to 16 blastomeres is called morula.

 

- wherein

Reproducation

 

 The mode of cleavage is determined by the amount of yolk and its distribution.

(I) Holoblastic - The cleavage, in which the segmentation lines pass through the entire egg, dividing it completely, eg: frog, human egg, etc.

(II) Meroblastic - The lines of segmentation do not completely pass through the egg and remain confined to a part of the egg, eg: insects, birds, reptiles.


Option 1)

pattern of cleavage

This option is correct.

Option 2)

number of blastomeres produced

This option is incorrect.

Option 3)

fertilization

This option is incorrect.

Option 4)

formation of zygote

This option is incorrect.

Posted by

Vakul

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