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Human Reproduction · Question 109

AIPMT 2002MCQEasy📈 Topic in 25% papers+4−1
1

What is true for cleavage?

  1. Size of embryo decreases
  2. Size of embryo increases
  3. Size of cells increases
  4. Size of cells decreases

Answer

(4) Size of cells decreases

Solution

As per NCERT, the zygote undergoes mitotic divisions called cleavage as it moves through the isthmus of the oviduct towards the uterus and forms 2, 4, 8, 16 daughter cells called blastomeres.

∵ There is no growth between successive divisions, the overall size of the embryo stays nearly the same while it is divided into more and more cells,

∴ the size of the cells (blastomeres) decreases.

Answer: (4)

AIPMT 2002

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2

Which set is similar?

  1. Corpus luteum – Graafian follicles
  2. Sebum – Sweat
  3. Bundle of His – Pacemaker
  4. Vitamin B7 – Niacin
AIPMT 2001
3

Which set is similar?

  1. Vitamin B7 – Niacin
  2. Sebum – Sweat
  3. Corpus luteum – Graafian follicles
  4. Bundle of His – Pacemaker
AIPMT 2001
4

Cleavage in mammals is

  1. holoblastic equal
  2. holoblastic unequal
  3. superficial
  4. discoidal.
AIPMT 2000
5

Blastopore is the pore of:

  1. A.C.
  2. Archenteron
  3. Blastocoel
  4. Coelom
AIPMT 2000

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