Draw a diagrammatic sectional view of the human ovary to show the development of follicles and ovulation. Label the different stages in the diagram.
Important Questions on Human Reproduction
Rashmi gave birth to three girls. Her mother-in-law blamed her for giving birth to girls. However, as we know, ova (eggs) are only of one type containing 22+X chromosomes, but sperms are of two types: one type of sperms contain 22+X chromosomes and another type of sperms contain 22+Y chromosomes. When ovum and sperm with 22+Y chromosomes are fused, a male child is formed and when ovum and sperm with 22+X chromosomes are fused, a girl child is produced.
Read the above passage and answer the following question:
How many types of sperms are produced? (Write in words)
Mahesh was working in Delhi, but his family was living in a village. One day he received a letter from his father that he is planning the marriage of his sister who is fourteen years old. Mahesh wrote to his father that he should postpone the marriage of his sister till she becomes 18 years old.
Read the above passage and answer the following question:
Who is right, Mahesh or his father?
Mahesh was working in Delhi, but his family was living in a village. One day he received a letter from his father that he is planning a marriage of his sister who is fourteen years old. Mahesh wrote to his father that he should postpone the marriage of his sister till she becomes 18 years old.
Read the above passage and answer the following question:
What is the right age for marriage for girls? (Write in figures)
(b) Trace the journey of the ovum from the ovary, its fertilisation and further development until the implantation of the embryo.
(b) How is the placenta connected to the embryo?
(c) Placenta acts as an endocrine gland. Explain.
