Question

Study the following statements and answer the question.

In the transport of ovum in the female reproductive system, a process known as ‘A’ occurs and the ‘B’ division starts as the zygote moves through the ‘C’ of the oviduct towards the ‘D’. Identify A, B, C and D.

• A. A→Blastulation, B→Meiotic, C→Ampulla , D→Uterus
• B. A→Parturition, B→Meiotic, C→Infundibulum, D→Uterus
• C. A→Implantation, B→Mitotic, C→Fimbriae, D→ Ovary
• D. A→Cleavage, B→ Mitotic, C→Isthmus, D→ Uterus

Answer 1

The correct option is D A→Cleavage, B→ Mitotic, C→Isthmus, D→ Uterus

The given statement explains the process of cleavage. In this process, mitotic division starts as the zygote moves through the isthmus part of the oviduct (fallopian tube) towards the uterus.

Cleavage is the mitotic division of cells in the early embryo, following fertilisation. The different cells derived from cleavage are called blastomeres and form a compact mass called the morula. Cleavage ends with the formation of the blastula, in the uterus. The process of formation of blastula is called blastulation. The blastula is implanted in the uterus which leads to pregnancy.