Question

hlo everyone explain me about sexual reproduction and asexual reproduction ( 4 marks answer)


answer should be long .

Answer 1

Asexual reproduction is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes. Asexual reproduction is the primary form of reproduction for single-celled organisms such as archaea and bacteria.Many plants and fungi sometimes reproduce asexually.While all prokaryotes reproduce without the formation and fusion of gametes, mechanisms for lateral gene transfer such as conjugation, transformation and transductioncan be likened to sexual reproduction in the sense of genetic recombination in meiosis.A complete lack of sexual reproduction is relatively rare among multi-cellular organisms, particularly animals. It is not entirely understood why the ability to reproduce sexually is so common among them. Current hypotheses suggest that asexual reproduction may have short term benefits when rapid population growth is important or in stable environments, while sexual reproduction offers a net advantage by allowing more rapid generation of genetic diversity, allowing adaptation to changing environments.

Sexual reproduction is a kind of life cyclewhere generations alternate between cells with a single set of chromosomes (haploid) and cells with a double set of chromosomes (diploid).[1] Sexual reproduction is by far the most common life cycle in eukaryotes, for example animals and plants.Diploid cells divide into haploid cells in a process called meiosis. Two haploid cells combine into one diploid cell in a process called fertilisation. Between fertilisation and meiosis there can be a large number of cell divisions without change of the number of chromosomes.Fertilization creates a single-celled zygotewhich includes genetic material from both gametes. In a process called genetic recombination, genetic material (DNA) joins up so that homologous chromosomesequences are aligned with each other, and this is followed by exchange of genetic information. Two rounds of cell division then produce four daughter cells with half the number of chromosomes from each original parent cell, and the same number of chromosomes as both parents. For instance, in human reproduction each human cell contains 46 chromosomes in 23 pairs. Meiosis in the parents' gonads produce gamete cells which only contain 23 chromosomes each. When the gametes are combined via sexual intercourse to form a fertilized egg, the resulting child will have 23 chromosomes from each parent genetically recombined into 23 chromosome pairs or 46 total.

Answer 2

HELLO

RAM RAM

HOW ARE YOU

BTW

UR ANSWER

SEXUAL REPRODUCTION

A mode of reproduction in which the offspring comes from a single organism, and not from the union of gametes as it is in sexual reproduction.

ASEXUAL REPRODUCTION

The reproduction of single-celled organisms through fission, and the production of spores in some plants and plantlike organisms, are examples of asexual reproduction.