Chromosomes & Inheritance Gene Segregation during MEIOSIS 3 significant results 1. Haploid cells because of 2 divisions following only 1 DNA replication.

Slides:

Advertisements

Similar presentations

Flowers contain reproductive organs protected by specialized leaves.

Advertisements

Classify Which plant structures are male sexual organs and which are female sexual organs Apply Concepts Relate the characteristics of angiosperms reproduction.

Bellringer-April 1, 2014 How do flowers reproduce?

22.2 Reproduction in Flowering Plants TEKS 6G, 10B The student is expected to: 6G recognize the significance of meiosis to sexual reproduction and 10B.

Plant Reproduction. Alternation of Generations All plants have a diploid(2n) sporophyte generation that alternates with a haploid (1n) gametophyte generation.

Plant Sexual Reproduction & Development

Meiosis Chapter 10.

Chapter 11: MEIOSIS The Cellular Basis of Sexual Reproduction AP Biology RussellAP Biology Russell B. RhodesB. Rhodes.

Meiosis and Sexual Reproduction Ch

Sexual Reproduction In Animals and Plants

Plant Reproduction Asexual Reproduction Asexual reproduction is natural “cloning.” Parts of the plant, such as leaves or stems, produce roots and become.

What have we learned? We know that when a cell undergoes mitosis and cell division two new identical cells are produced We know that in asexual reproduction,

Ch 13 NOTES – Meiosis For a species to survive, it must REPRODUCE! Genetics Terminology: AutosomesSex chromosomes Somatic cellDiploid GameteHaploid KaryotypeZygote.

AP Biology Plant Reproduction. AP Biology The parasitic plant Rafflesia arnoldii (aka the corpse flower!)  Produces enormous flowers that can.

What to Study Chp 3. Cell containing only one chromosome from each homologous pair. Haploid.

Meiosis Chapter 9 1. ________ Male reaches under his mantle with tentacle, removes packet of sperm, and insert it into female’s egg chamber A. Reproduction.

Reproduction ASEXUAL VS. SEXUAL.

Chapter 9: Meiosis Pages Sexual Reproduction the union of 2 specialized sex cells (gametes) to form a single cell called a zygote Gametes usually.

Meiosis Biology 1114.

Ch. 24- Reproduction of Seed Plants.  I. Reproduction With Cones and Flowers  A. Alternation of Generations  - All plants have a life cycle in which.

Reproduction in Plants. Flower Reproductive structure of angiosperm Sporophyte – diploid  Produces haploid spores  Mitosis produces haploid gametophyte.

Aim: How are plants adapted to reproduce? Flower Alternation of Generations.

Plant Classification & Reproduction. Plants can be classified into 2 main groups: Non-seed plants  mosses = no vascular systems  ferns = vascular systems.

ALTERNATION OF GENERATIONS AND PLANT LIFE CYCLES Copyright © 2009 Pearson Education, Inc.

Fertilisation In Mammals  Sperm are produced in the testes  Eggs are produced in the ovaries  Fertilisation occurs when a sperm swims up the oviduct.

14.4 The Life Cycle of Flowering Plants Biology 1001 November 25, 2005.

Chromosomes & Inheritance Gene Segregation during MEIOSIS 3 significant results 1. Haploid cells because of 2 divisions following only 1 DNA replication.

Meiosis and Sexual Reproduction

Meiosis and Sexual Reproduction Section 1 Section 2 Meiosis Sexual Reproduction.

Meiosis and Sexual Reproduction.  Of the following organisms, which is haploid (one set of chromosomes) and which is diploid (two sets of chromosomes)?

Sexual reproduction Life cycles and the alternation of generations.

MEIOSIS AND SEXUAL LIFE CYCLES CH 13. I. Overview of Reproduction Asexual reproduction: produces identical offspring (budding, cloning, binary fission/mitosis)

Chapter 10.5 From Gametes to Offspring AP Biology Fall 2010.

Plant Life Cycles Meiosis Review Cell starts diploid –E–Ex: Human = 46 chromosomes Cell divides twice to create 4 cells End result: Haploid cells –E–Ex:

1 1 Asexual Reproduction Requires only one parent New organism is identical to the parent New organism will have DNA identical to the parent.

Plant Structure and Reproduction Double Fertilization.

Meiosis and Sexual Reproduction 4.1 Halving the Chromosome Number 4.1 Halving the Chromosome Number 4.2 Genetic Variation 4.2 Genetic Variation 4.3 The.

$200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 Vocabulary 1 MeiosisFlowersReproduction.

AP Biology Start Here AP Biology First seed plants  Gymnosperm: conifers  vascular  heterospory  male vs. female gametophytes.

Structural Adaptations for Reproduction PARTS OF A FLOWER 4/6/16.

spore pollen grain ovule seed angiosperm stamen anther 3.2 Plant Reproduction filament pistil stigma style ovary pollen tube fruit.

Sexual Reproduction and Meiosis

I- DNA Using DNA to Make Proteins: As You grow cells divide producing new cells. These cells become specialized organs and grow larger.

Flowers contain reproductive organs protected by specialized leaves.

Part 3: Reproduction in Seed Plants

Asexual Reproduction Versus Sexual Reproduction

Asexual Reproduction & Plant reproduction

Flowers contain reproductive organs protected by specialized leaves.

Plant life cycles alternate between producing spores and gametes.

The Cellular Basis of Inheritance: Life Cycles

Plant Classification & Reproduction

Flowers contain reproductive organs protected by specialized leaves.

Plants can reproduce either asexually or sexually

The student is expected to: 6G recognize the significance of meiosis to sexual reproduction and 10B describe the interactions that occur among systems.

PowerLecture: Chapter 10

Flowers contain reproductive organs protected by specialized leaves.

Meiosis and Sexual Reproduction

ALTERNATION OF GENERATIONS a defining feature of plants

Where does my DNA Come From?

Reproduction and Growth

Reproduction of Seed Plants

Flowers contain reproductive organs protected by specialized leaves.

Seeded Plant Reproduction

Sexual reproduction M. Khan.

Flowers contain reproductive organs protected by specialized leaves.

PowerLecture: Chapter 10

Ch. 24- Reproduction of Seed Plants

Presentation transcript:

Chromosomes & Inheritance Gene Segregation during MEIOSIS 3 significant results 1. Haploid cells because of 2 divisions following only 1 DNA replication. Fusion of haploid nuclei (sexual reproduction) restores the diploid number 2. Metaphase 1- maternal & paternal chromosomes have equal chances of aligning on the equator, resulting in combinations of chromosomes from both parents

Chromosomes & Inheritance Gene Segregation during MEIOSIS 2. Number of possible chromosome combinations in haploid nuclei from meiosis is LARGE (greater with more chromosomes)! Formula for possible chromosomal combinations in the resulting nuclei is 2 n (n=number of chromosome pairs) 3. Crossing-over generates more variation. It occurs every meiosis and sites vary every meiosis.

Chromosomes & Inheritance MEIOSIS in Animals & Plants ANIMALS Most are diploid Meiosis produces haploid gametes Fusion of haploid gametes produces a diploid zygote during fertilization, which then carries out mitosis (sexual reproduction) Gametes are the only haploid stage of the life cycle (formed in specialized cells) Males – sperm (spermatogenesis) Spermatozoa (sperm) produced in testes

Chromosomes & Inheritance MEIOSIS in Animals & Plants Ovum (eggs) are produced in the ovaries Females – egg (oogenesis)

Chromosomes & Inheritance MEIOSIS in Animals & Plants Sexually reproducing plants have 2 phases 1.Gametophyte (haploid) – gametes are produced PLANTS 2. Sporophyte (diploid) – haploid spores are produced Angiosperm (flowering plants) Flower is where sexual reproduction takes place

Chromosomes & Inheritance MEIOSIS in Animals & Plants Female reproductive organs: Pistils – stigma, style, ovary Stigma – sticky surface to collect pollen Style – thin stalk down which the pollen tube grows from the stuck pollen Ovary – contains ovules (embryo sac with a single egg cell)

Chromosomes & Inheritance MEIOSIS in Animals & Plants Male reproductive organs: Stamen – anther, filament Anther – release the pollen Filament – the stalk

Chromosomes & Inheritance MEIOSIS in Animals & Plants Plants produce gametes from “gametophytes” Plants life cycles include 2 phases called the alternation of generations 1.Haploid gametophyte generation Begins with spores produced during meiosis In flowering plants the spores become pollen and embryo sac

Chromosomes & Inheritance MEIOSIS in Animals & Plants 2. Diploid Sporophyte generation Initiated by fertilization Specialized haploid cells (spores) produced