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Cleavage is

a)

Meiosis of zygote into blastomeres

b)

Mitosis of zygote into blastomeres

c)

Reductional division of zygote

d)

Reductional division of embryo


Question ID - 6923 | Toppr Answer

Cleavage is

a)

Meiosis of zygote into blastomeres

b)

Mitosis of zygote into blastomeres

c)

Reductional division of zygote

d)

Reductional division of embryo

1 Answer - 5876 Votes

3537

Answer Key : (b) -

(b)

Rapid mitosis in zygote into the blastomeres

Gametes. The major reproductive events in human beings are as follows

(i) Gametogenesis It is the formation of gametes. It includes spermatogenesis (formation of sperms) and oogenesis (formation of ova/eggs)

(ii) Insemination  It is the transfer of sperms by the male into the genital tract of the female

(iii) Fertilization  Fusion of male and female gametes to form zygote is called fertilization

(iv) Cleavage  It is rapid mitotic divisions of the zygote which convert the single celled zygote into a multicellular structure called blastocyst (blastula)

(v) Implantation  It is the attachment of blastocyst to the uterine wall

(vi) Placentation  It involves the formation of placenta which is the intimate connection between the foetus and uterine wall of the mother to exchange the materials

(vii) Gastrulation  It is the process by which blastocyst is changed into gastrula with three primary germ layers

(viii) Organogenesis  It is the formation of specific tissue, organs and organ systems from three primary germ layers

(ix) Parturition (child birth) it involves expelling of the baby from the mother’s womb (uterus)



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