Question

The type of cleavage in a egg is determined by

• A. Number of egg membranes
• B. Amount and distribution of yolk
• C. Size and position of nucleus
• D. Size and shape of sperm

Answer 1

The correct option is B Amount and distribution of yolk

Pattern of embryonic cleavage is determined both by the position of the mitotic spindles and by the amount and distribution of yolk. Yolk tends to inhibit cleavage. It slows it down or actually prevents complete cleavage. Yolk is an adaptation of those animals that go through more or less of embryogenesis isolated from any food supply.