In spermatogenesis, reduction division of chromosome occurs during conversion of
spermatogonia to primary spermatocytes
primary spermatocytes to secondary spermatocytes
secondary spermatocytes to spermatids
spermatids to sperms
Presence of which of the following hormone in the urine confirms pregnancy?
Progesterone
Oestrogen
Human chorionic gonadotropin
Prolactin
A pregnant female delivers a baby, who suffers from stunted growth, mental retardation low intelligence quotient and abnormal skin. This is the result of
deficiency of iodine in diet
low secretion of growth hormone
cancer of the thyroid gland
over secretion of pars distalis
What is the correct sequence of sperm formation?
Spermatid, Spermatocyte, Spermatogonia, Spermatozoa
Spermatogonia, Spermatocyte, Spermatozoa, Spermatid
Spermatogonia, Spermatozoa, Spermatocyte, Spermatid
Spermatogonia, Spermatocyte, Spermatid, Spermatozoa
Which one of the following is not the function of placenta? It
facilitates supply of oxygen and nutrients to embryo
secretes oestrogen
facilitates removal of carbon dioxide and waste material from embryo
secretes oxytocin during parturition
The correct sequence of embryonic development is
Blastula - Morula - Zygote - Gastrula - Embryo
Zygote - Blastula - Morula - Gastrula - Embryo
Zygote - Morula - Blastula - Gastrula - Embryo
Gastrula - Morula - Zygote - Blastula - Embryo
C.
Zygote - Morula - Blastula - Gastrula - Embryo
The mitotic division starts as the zygote moves towards the isthmus of the oviduct towards the uterus called cleavage. The cleavage converts the egg into a compact mass of blastomeres called morula, which ultimately transforms into blastula. The blastula precedes the formation of the gastrula in which the germ layers of the embryo forms. Gastrulation is followed by organogenesis, when individual organs develop within the newly formed germ layers. Each layer gives rise to specific tissues and organs in the developing embryo. Thus, the correct sequence is
Zygote Morula Blastula Gastrula Embryo
If spermatogenesis proceeds too rapidly, inhibin is released. Inhibin reduces the secretion of
Luteinising Hormone (LH)
Follicle Stimulating Hormone (FSH)
Testosterone
Interstitial Cell Stimulating Hormone (ICSH)