Question

Fill in the blanks
a. Humans reproduce ………..……. (asexually/sexually)
b. Humans are ………..…… (oviparous/viviparous/ovoviviparous)
c. Fertilisation is ………………. in humans (external/internal)
d. Male and female gametes are ……………….(diploid/haploid)
e. Zygote is ………………. (diploid/haploid)
f. The process of release of ovum from a mature follicle is known as …………….
g. Ovulation is induced by a hormone called ………………
h. The fusion of male and female gametes is called ……………
i. Fertilisation takes place in ……………
j. Zygote divides to form …………… which is implanted in the uterus.
k. The structure which provides the vascular connection between foetus and uterus is called ……………

Answer 1

Human reproduction is a form of sexual reproduction in which fertilization takes place. It typically involves sexual intercourse between a man and a woman during which the interaction between the male and female gamete results in fertilization of the woman's ovum by the man's sperm.

Complete Answer:
a. Humans reproduce sexually.
b. Humans are viviparous.
c. Fertilisation is internal in humans.
d. Male and female gametes are haploid.
e. Zygote is diploid.
f. The process of release of ovum from a mature follicle is called ovulation.
g. Ovulation is induced by a hormone called luteinizing hormone.
h. The fusion of male and female gametes is called fertilisation.
i. Fertilisation takes place in the oviduct.
j. Zygote divides to form blastula which is implanted in the uterus.
k. The structure which provides the vascular connection between foetus and uterus is called the umbilical cord.

Note:
Specialized reproductive cells called gametes are created by a process called meiosis. While normal cells contain 46 chromosomes, 23 pairs, gamete cells contain only 23 chromosomes. When these two cells merge into one zygote cell, genetic recombination occurs and the new zygote will contain 23 chromosomes from each parent, giving them 23 pairs. The zygote then develops into the foetus.