NEET 2000 Biology question

Cleavage in mammals :

(1)Holoblastic equalCorrect
(2)Holoblastic unequal
(3)Superficial
(4)Discoidal

Answer: (1)

Solution

Mammalian eggs are alecithal or microlecithal (almost no yolk), so the cleavage furrows pass completely through the egg; the cleavage is therefore holoblastic (complete). The blastomeres are equal or nearly equal in size in the early divisions, so the standard answer is holoblastic equal, option (1). (In placental

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-088724