Eduard Strasburger (1844-1912) demonstrated fertilization from inside the angiosperms and you can exhibited the beliefs of fertilization described of the Hertwig to possess pet was real for vegetation as well.
Hermann Henking (1858-1942) noticed you to during the spermatogenesis on hemipteran insect Pyrrhocoris, you to chromatin looks goes to only one pole while in the anaphase II which means that half the new sperms bring this chromatin muscles, when you’re 1 / 2 of sperms lack it.
Theodor Boveri (1862-1915) read meiosis within the Ascaris and you can revealed synapsis away from chromosomes. The guy including led to the new formulation of your chromosome theory regarding genetics.
Edmund Beecher Wilson (1856-1939) organised new cytological and embryological knowledge inside the classical guide “The newest Cellphone from inside the Invention and Inheritance.”
Carl Franz Joseph Correns (1864-1933), a Italian language botanist, did hybridization experiments inside maize, peas, kidney beans along with other herbs and reported that his efficiency was in fact similar to those people obtained from the Mendel in the 1865 during the garden peas.
This mechanism grew to become known as jswipe recenzja XO mechanism out of gender determination
Erich von Tschermak (1871-1962), an enthusiastic Austrian botanist, analyzed the results of crossing toward vigour inside the peas and you can got similar abilities while the Mendel had gotten. Hugo de- Vries (1848-1935), an effective Dutch biologist, rediscovered Mendel’s statutes because of their hybridization tests.
Hugo de- Vries, during the training away from evening primrose (Oenotheralamarckiana), seen abrupt heritable variations in that it bush and you will coined the expression mutation to have abrupt heritable alter.
For the 1901, the guy blogged the ebook “Pass away Mutationstheorie” (This new Mutation Theory) and then he amassed the content on the mutations. Although not, the mutations inside Oenothera reported because of the de- Vries will be alter from inside the chromosome construction and you can count and not gene or part mutations.
Walter S. Sutton (1876-1916) studied protection section and you will recognized parallelism between the behaviour off chromosomes throughout the meiosis as well as the Mendelian segregation of genes. When you look at the 1903, he typed their 2nd, report and he elaborated the brand new chromosome principle regarding heredity. He demonstrated you to definitely chromosome sets (bivalents) segregate at random providing rise so you’re able to independent assortment of genetics.
The task away from Sutton led to the mixture out of cytology and you can genes for the a special discipline called cytogenetics. This new “chromosome idea regarding genetics” is also known as “Sutton-Boveri idea from chromosomal inheritance”. The fresh new parallelism between genes and you may chromosomes could be temporarily Summarised as uses.
(1) While in the inheritance, this new family genes and the chromosomes both behave like individual products. Each set of chromosomes can be seen become distinctive from other couple and every chromosome enjoys characteristics. Also for each and every gene provides an individuality.
(2) The new heredity development will be informed me for the expectation the family genes during the an individual take place in sets (allelic pair) and therefore one person in for every couple is provided by you to father or mother, just like the almost every other member of the brand new allelic partners try available with another father or mother. Similarly, chromosomes in just one and take place in sets, for every person in which was based on one of many several parents of the individual.
The guy including unearthed that the new eggs fertilized because of the one type of jizz delivered female, since the eggs fertilized by the different kind of jizz introduced male bug
(3) For each gamete contains only 1 person in per collection of chromosomes. Also, each gamete contains you to definitely member of per pair of alleles regarding genes. In the Mendel’s concept, segregation of a single allele happens from the couple and every allele gets in inside the ete. Furthermore for every single chromosome sets apart from the homologous pair during the meiosis and is included inside good ete.
W.L. Johannsen (1857-1927) created the fresh words gene, genotype and phenotype. He studied the results away from selection for seeds pounds inside the Little princess sort of bean (Phaseolus vulgaris), and noticed you to progenies produced by hefty seed were described as better suggest lbs versus progenies in the light vegetables.