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 the pancreas is considered a mixed gland, Q. What is a mixed gland? Why...

Q. What is a mixed gland? Why the pancreas is considered a mixed gland? Mixed gland is a gland that produces exocrine and endocrine secretions. The pancreas is an example of

The nurse''s role in relieving the child''s stress, The Nurse's Role  in ...

The Nurse's Role  in Relieving  the Child's Stres s Turning passive experiences into active ones that facilitate the child's healthy - Problems-I  adjustment to hospitalization

What is histone methyl transferases, Histone methyl transferases (HMTs) hav...

Histone methyl transferases (HMTs) having a protein domain called SET. This domain is responsible to adding methyl groups to histones. Which of the following is a false statement r

What is implant failure, What is Implant Failure The total failure of t...

What is Implant Failure The total failure of the implant to fulfill its purpose which are functional, esthetic and phonetic because of mechanical or biologic reasons.

Explain causes of shigellosis, Q. Explain causes of Shigellosis? Shigel...

Q. Explain causes of Shigellosis? Shigellosis is caused by the genus Shigella and is a common enteric (intestinal) infection. The genus has four serological groups,

What is vacuoles, What is Vacuoles A very conspicuous feature in most p...

What is Vacuoles A very conspicuous feature in most plant cells is the presence of one or more large vesicles called vacuoles which are separated from the rest of the cytoplasm

Concept of digestion in the stomach, Digestion in the Stomach To unders...

Digestion in the Stomach To understand  the digestion mechanism  in the stomach, it is important to know about the anatomy of the stomach. Look up Unit 6, in the Applied Physio

How does water move inside sponges, How does water move inside sponges? Wha...

How does water move inside sponges? What is the function of the pores in these animals? Sponges are filtering beings. They make water enter their bodies by their lateral pores

What is symbiosis, Question Write a short note on the following: 1...

Question Write a short note on the following: 1 Gram staining 2 Embden-Meyerhoff-Parnas pathway 3 Interferons 4 Probiotics 5 Pasteurization 6 Endospores

What is angina pectoris, Q. What is Angina Pectoris? Chest discomfort i...

Q. What is Angina Pectoris? Chest discomfort is often reported by most patients especially those which are chronic cases of dyslipidemia and/or hypertension. Like diarrhoea and

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