Definitions for sexual reproduction
sex·u·al re·pro·duc·tion

Princeton's WordNetRate this definition:0.0 / 0 votes

1. sexual reproduction, amphimixisnoun

   reproduction involving the union or fusion of a male and a female gamete

WikipediaRate this definition:0.0 / 0 votes

1. Sexual reproduction

   Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete (haploid reproductive cells, such as a sperm or egg cell) with a single set of chromosomes combines with another gamete to produce a zygote that develops into an organism composed of cells with two sets of chromosomes (diploid). This is typical in animals, though the number of chromosome sets and how that number changes in sexual reproduction varies, especially among plants, fungi, and other eukaryotes.Sexual reproduction is the most common life cycle in multicellular eukaryotes, such as animals, fungi and plants. Sexual reproduction also occurs in some unicellular eukaryotes. Sexual reproduction does not occur in prokaryotes, unicellular organisms without cell nuclei, such bacteria and archaea. However, some process in bacteria may be considered analogous to sexual reproduction in that they incorporate new genetic information, including bacterial conjugation, transformation and transduction. Some proteins and other features that are key for sexual reproduction may have arisen in bacteria, but sexual reproduction is believed to have developed in an ancient eukaryotic ancestor.In the production of gametes in eukaryotes, diploid precursor cells divide to produce haploid cells in a process called meiosis. In meiosis, DNA is replicated to produce a total of four copies of each chromosome. This is followed by two cell divisions to generate haploid gametes. After the DNA is replicated in meiosis, the homologous chromosomes pair up so that their DNA sequences are aligned with each other. During this period before cell divisions, genetic information is exchanged between homologous chromosomes in a process known as genetic recombination. Homologous chromosomes contain highly similar but not identical information, and by exchanging these similar but not identical regions, genetic recombination increases genetic diversity among future generations.Gametes may be stored in the parents' gonads for later sexual reproduction, which involves the combination of gametes. During sexual reproduction, two haploid gametes combine into one diploid cell known as a zygote in a process called fertilization. The nuclei from the gametes fuse, and each gamete contributes half of the genetic material of the zygote. Multiple cell divisions by mitosis (without change in the number of chromosomes) then develop into a multicellular diploid phase or generation. In human reproduction, each diploid cell contains 46 chromosomes, or 23 pair chromosomes. Meiosis in the parents' gonads produces gametes that each contain only 23 chromosomes that were genetically recombined in each gamete. When the nuclei of the gametes come together to form a fertilized egg or zygote, each cell of the resulting offspring will have 23 chromosomes from each parent, or 46 in total.In plants, the diploid phase, known as the sporophyte, produces spores by meiosis. These spores then germinate and divide by mitosis to form a haploid multicellular phase, the gametophyte, which produces gametes directly by mitosis. This type of life cycle, involving alternation between two multicellular phases, the sexual haploid gametophyte and asexual diploid sporophyte, is known as alternation of generations. The evolution of sexual reproduction is considered paradoxical, because asexual reproduction should be able to outperform it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation. This 50% cost is a fitness disadvantage of sexual reproduction. The two-fold cost of sex includes this cost and the fact that any organism can only pass on 50% of its own genes to its offspring. However, one definite advantage of sexual reproduction is that it increases genetic diversity and impedes the accumulation of genetic mutations.Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction. It has been described as "a powerful evolutionary force that does not exist in asexual populations".

ChatGPTRate this definition:0.0 / 0 votes

1. sexual reproduction

   Sexual reproduction is a biological process by which new individuals or offspring are produced through the combination of genetic materials from two parent organisms of different sexes. It typically involves the union of male and female gametes (sperm and egg cells), resulting in offspring with a genetic mix from both parents. This process contributes to genetic diversity within a species.

WikidataRate this definition:0.0 / 0 votes

1. Sexual reproduction

   Sexual reproduction is a process that creates a new organism by combining the genetic material of two organisms; it occurs both in eukaryotes and in prokaryotes. A key similarity between bacterial sex and eukaryotic sex is that DNA originating from two different individuals join up so that homologous sequences are aligned with each other, and this is followed by exchange of genetic information. After the new recombinant chromosome is formed it is passed on to progeny. On the other hand, bacterial conjugation, a type of transfer of DNA between two bacteria, is often mistakenly confused with sexual reproduction, because the mechanics are similar. However, bacterial conjugation is controlled by plasmid genes that are adapted for spreading copies of the plasmid between bacteria. The infrequent integration of a plasmid into a host bacterial chromosome, and the subsequent transfer of a part of the host chromosome to another cell do not appear to be bacterial adaptations. In contrast, bacterial transformation can be regarded as a form of sex in bacteria. Bacterial transformation is a complex process encoded by numerous bacterial genes, and is clearly a bacterial adaptation for DNA transfer. This process occurs naturally in at least 40 bacterial species. For a bacterium to bind, take up, and recombine exogenous DNA into its chromosome, it must enter a special physiological state referred to as competence. Sexual reproduction in early single-celled eukaryotes may have evolved from bacterial transformation.

Matched Categories

1. • Reproduction

How to pronounce sexual reproduction?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say sexual reproduction in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of sexual reproduction in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of sexual reproduction in Pythagorean Numerology is: 6

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=sexual reproduction
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Sexual_Reproduction
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=sexual reproduction