VINAYAKAR MATRICULATION HIGHER SECONDARY SCHOOL, SIVAKASI. NEW Academic Year for 12 thStudents

CLASS : XII Subject: BIO-ZOOLOGY DATE :24- 04-2020

Bi-Zo-Notes-01:1Page; Bi-Zo-Notes-02: 2-3 Pages ( 28-04-20)

Warm Greetings!

Unit - “REPRODUCTION IN ORGANISMS”

In this YouTube link ,you have to learn about “REPRODUCTION IN ORGANISMS” lesson.

� Reproduction is the process by which living beings give its own kind to the world.

� Types of reproduction

• Asexual Reproduction

• Sexual reproduction

� Asexual reproduction modes ->fission, budding, fragmentation, regeneration.

� Sexual reproduction modes-> syngamy, autogamy, exogamy, hologamy, paedogamy,

merogamy, isogamy, anisogamy and conjugation.

o Special type of mode -> parthenogenesis

� Parthenogenesis -> natural and artificial

� Development of embryo

• Oviparous

• Viviparous

• Ovoviviparous

URL: https://www.youtube.com/watch?v=1o-1CwRpGEk

VINAYAKAR MATRICULATION HIGHER SECONDARY SCHOOL, SIVAKASI. NEW Academic Year for 12 thStudents

CLASS : XII Subject: BIO- Zoology-02 DATE :28-04-2020

INTRODUCTION

Hope all would have learnt the first chapter with the given url links. The second chapter is

about “Human Reproduction”

In this chapter, we are going to look about the following sections

� Reproduction is the process of giving one’s own species and maintain about them.

� The events of human reproduction are as follows:

1. Gametogenesis -> Formation of gametes

2. Insemination -> transfer of sperms by the male into the female genital tract.

3. Fertilisation -> Ovum fertilized by the sperm

4. Cleavage -> To produce blastula

5. Implantation -> on the walls of uterus

6. Placentation -> Embedding of embryo on the endometrium of the uterus

7. Gastrulation -> Movement of blastomeres

8. Organogenesis -> Formation of specific tissues, organs and organ systems

from three germ layers.

9. Parturition -> development of human foetus and give birth the child.

URL :

BIO - ZOOLOGY

Part 1- Male and FEmale Reproductive System

https://www.youtube.com/watch?v=dDGD0nGWd8Q

Part2- Spermatogenesis

https://www.youtube.com/watch?v=J_-kd16GLeQ

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FEMALE REPRODUCTIVE SYSTEM

(ovaries, oviducts, uterus,

cervix, vagina)

MALE REPRODUCTIVE SYSTEM

(testes, duct, penis)

REPRODUCTIVE SYSTEM

Part 3 - Menstural Cycle

https://www.youtube.com/watch?v=3Lt9I5LrWZw

Part 4 - Fertilization and Implantation

https://www.youtube.com/watch?v=LszoBnsvBhE

Part 5 - Pregnancy and WEmbryonic Development

https://www.youtube.com/watch?v=e5H-Kbz8JTs

Part 6 - Parturition

https://www.youtube.com/watch?v=MrlVXZegGn4&list=UU m76DE1V3ur2fEm5hyZuywA&i

ndex=18

Part 7 -Lactation

https://www.youtube.com/watch?v=LvK6Gm8q5V8&list=UU m76DE1V3ur2fEm5hyZuywA&

index=19

Preview :

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VINAYAKAR MATRICULATION HIGHER SECONDARY SCHOOL, SIVAKASI. NEW Academic Year for 12 thStudents

CLASS : XII Subject: BIO- BOTANY DATE :24 -04-2020

Bi-Bo-Notes-01: 1 Page Bi-Bo-Notes-02: 2 - 3 Pag es (28-04-20)

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Warm Greetings! Bi-Bo-Notes-01: Page - 1

Unit - “ASEXUAL AND SEXUAL REPRODUCTION”

In this YouTube link ,you have to learn about “ASEXUAL AND SEXUAL REPRODUCTION” lesson.

� Every organism in the universe reproduces.

� Methods they adopt are:

• Fragmentation, budding, gemma, binary fission, regeneration

� Organisms reproduce through Asexual and sexual means

� Asexual Reproduction -> natural ways, artificial ways, micropropagation(modern method)

� Sexual Reproduction -> Gametogenesis and fertilization

� In Plants -> how does reproduction happen? Stages are

• Development of microspore

• Development of megaspore

• Presence of Embryo sac

• Pollination, cross-pollination

• Fertilization, Double fertilization

• Seed formation

• Formation of fruit

URL: https://youtu.be/kaSIjIzAtYA

Preview YouTube video TN 12th std Bio-Botany, Unit 1 “ASEXUAL AND SEXUAL REPRODUCTION”

$ $ $ $ $ $

28-04-2020

BIO BOTANY CHAPTER 2 ( Pages 2 & 3)

INTRODUCTION

This is the second chapter in Bio-Botany. It is about “Classical Genetics” .

Hope all would have learnt about the first chapter in the given url.

The topics that we are going to cover in this chapter are:

� Heredity and variation -> transmission of characters from parents to offsprings.

• Variation types

1. Continuous variation

2. Discontinuous variation

� Mendelism -> Contribution of Mendel to the Genetics

� Laws of mendelian inheritance ->

Laws of Dominance -> Expression of only one of the parental

characters in F1 generation

Laws of Segregation -> Expressions of both the characters are seen in

F2 generation.

� Monohybrid cross, dihybrid cross, Trihybrid cross -> Monohybrid is the inheritance of a

single character. Dihybrid cross is the inheritance of two characters. Trihybrid cross is

the inheritance of multiple traits.

� Backcross and testcross -> TestCross is the crossing an individual of unknown

genotype with a homozygous recessive. Backcross is a cross of F1 hybrid with any one

of the parental genotypes.

� Interaction of genes -> a single phenotype is controlled by more than one set of genes.

� Polygenic inheritance -> several genes combine to affect a single trait

� Extra chromosomal inheritance -> Traits of the genes in nuclear chromosomes are

controlled by either the chloroplast or mitochondria

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URL :

Part1 - Heredity and variation https://www.youtube.com/watch?v=TJCiq8nlp14

Part2 - Mendelism

https://www.youtube.com/watch?v=2ycwGQUjmJY&list=PLKlDmF-iIyAkT0rhgMzSvGmqQz5IicCM

s

Part 3 - Monohybrid, Dihybrid and Trihybrid cross

https://www.youtube.com/watch?v=ao2jjHhdxq8&list=PLKlDmF-iIyAkT0rhgMzSvGmqQz5IicCMs&i

ndex=4

Part 4 - Backcross and Test Cross https://www.youtube.com/watch?v=EMsN90ysBJ0

Part 5 - Gene Interactions - https://www.youtube.com/watch?v=mPdMlUVf3XI

Part 6 - Extra Chromosomal Inheritance or Cytoplasmic inheritance

https://www.youtube.com/watch?v=aA-0p6TaV-E

Preview :

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