Reproduction in Animals Test - 4

When luteinizing hormone is injected into the body of adult males, more of testosterone is produced because testosterone produced is under the control of luteinizing hormone.

In unisexual reproduction, the union of male and female cells can take place outside the body, inside the body and in water in some cases.

The reproductive cycle of animals and plants is characterised by the alternation of meiosis and fertilisation.

The female sex hormone estrogen is produced by cells of graafian follicle. Graffian Follicle is a fluid-filled structure in the mammalian ovary within which an ovum develops prior to ovulation.

From 100 primary oocytes, the number of secondary oocytes formed is 200.

When ovulation occurs, the ovum is captured by the infundibulum and enters the oviduct because of cilia on the oviductal lining that beat in a uterine direction.

Asexual reproduction requires one individual.Asexual reproduction is a mode of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it is reproduction which almost never involves ploidy or reproduction without the fusion of gametes.

In gynadromorphs, as seen in Drosophila (fruit fly), one half of the body is male and the other half is female.

Embryology is the branch of biology that deals with the development of an embryo from the fertilization of the ovum to the fetus stage.

The middle piece of sperm provides energy.The midpiece has a central filamentous core with many mitochondria spiralled around it, used for ATP production for the journey through the female cervix, uterus and uterine tubes.