Sexual reproduction, Biology

Assignment Help:

SEXUAL REPRODUCTION

1.       Amphigony        -          Zygote is formed.

(i) Syngamy

Fusion of gametes.

(a) Endogamy - It involves self fertilisation. e.g. Taenia.

(b) Exogamy - It involves cross fertilisation. e.g. Earthworm, cockroach.

Again syngamy is of 2 types - (i) Isogamy - monocystis

(ii) Anisogamy - rest all

Special form of syngamy-

(i) Neotany - Sexual reproduction in larval stage, e.g. axolotal larva of ambyostoma, urochordata.

(ii) Polyembryony - The blastomeres formed by division of zygote separate at early stage. Each produces a complete individuals. e.g. flateworm, identical twins, armadillo produces 4 young ones from one zygote.

1412_male reproductive system.png

700_male reproductive system.png2213_male reproductive system rabbit.png


Related Discussions:- Sexual reproduction

Why do cells of the nephron tubules, Q. Why do cells of the nephron tubules...

Q. Why do cells of the nephron tubules present a great amount of mitochondria? The cells of the tubule wall have high number of mitochondria because many substances are secrete

Agro industrial-early embryonic mortality, Early embryonic mortality E...

Early embryonic mortality Embryo mortality is a serious problem for farmers, practitioners and researchers. The establishment and maintenance of pregnancy is a highly complica

Wet stigma - category of stigma, Wet Stigma - Category of Stigma Petun...

Wet Stigma - Category of Stigma Petunia shows several randomly distributed 2-celled papillae on its surface. In a developing stigma, the epidermis is covered by a continuous,

How can denaturation be classified, Q. How can denaturation be classified c...

Q. How can denaturation be classified concerning its reversibility? Protein denaturation can be an irreversible or a reversible process, i.e., it may be impossible or possible

What is the modern darwinist theory, In the time of Darwin the results of M...

In the time of Darwin the results of Mendel's research on biological inheritance had not been published, Genetics was not yet developed, neither DNA nor the concept of genetic muta

Define the fluidized dryers, Define the Fluidized Dryers? Fluidization ...

Define the Fluidized Dryers? Fluidization occurs when a flow of fluid upwards through a bed of particles (ranging from fine powders to particulate foods such as diced carrots)

Causes of diabetic ketoacidosis, Q. Causes of Diabetic Ketoacidosis? Th...

Q. Causes of Diabetic Ketoacidosis? The causes of Diabetic Ketoacidosis (DKA) are the following: - Missing of insulin injection - Infection - Trauma (injury) - Myoc

Trypanosomes – flagellates, Trypanosomes – Flagellates The trypanosome...

Trypanosomes – Flagellates The trypanosomes are among the serious pathogens that cause high mortality among human populations and domestic animals in Africa and also in South

Explain the symbiotic relationships and their types, Explain the Symbiotic ...

Explain the Symbiotic Relationships and their types? Symbiosis : refers to a special type of association in which two species live together in a closely held relationship. In

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd