Kategóriák: Minden - development - chromosomes - nucleus - reproduction

a Mario San Millan 7 éve

354

Cell reproduction

Cell reproduction encompasses both sexual and asexual methods. Sexual reproduction requires two parents and involves complex stages, including gametogenesis, fertilization, embryonic development, and postembryonic development.

Cell reproduction

Cell reproduction

Cell cycle

M phase
cytokinesis or division of the cytoplasm
mitosis or divison of the nucleus
Interphase
G2 Phase

The cell divides into two

S Phase

Hereditary material duplicates

G1 Phase

Cell increases in size and synthetize proteins

Reproduction

sexual

This needs two parents to reproduce

Have different processes

4º. Postembryonic development

After germination and formation of adult

3º. Embryonic development

The form of embryo after the zygote division

2º. Fertilisation

Fusion of gametes

1º. Gametogenesis

Formation of gametes

asexual

A single parent produce a new generation of living things

Binary fission

A cell divide the nucleus and then the cytoplasm into two equally daugther cells

Multiple fision

The nuclei is divided into differet small daugthers that before are released

Fragmentation

Multicellulaar organisms divide into diferent segments and from this segments appear a new individual

Budding

A bud appears on an unicellular organisms and a new individual is form

Kariotypes

The human kariotypes
Complete set of pairs of chromosomes of a cell

number of chromosomes

Diploid

Is the total number of chromosomes and is represented as 2n

Each paired of chromosomes that come from a different parent, this pairs are called homologus chromosomes

Haploid

Is only one set of chromosomes and is represented as n

The nucleus

Nuclear lamina

Is a protein structure located in the inner face of the plasma membrane

Nucloplasm

internal content of the nucleus

Nucleoi

Were the molecules are synthesised

Chromatin

Is made up of DNA and proteins

Centrosome

Only appear in animals during interphase

Nuclear membrane

It has two membranes, also it have pores were the molecules go out and in

Nucleus in division

DNA packaging
Change apperance

Chromosomes

Types
Parts

Sex chromosomes