https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6 Fatto con il piacere dell’avventura en-us 2021-10-13 08:10:42 UTC 2023-01-20 08:44:12 UTC hello@padlet.com https://padlet.net/icons/png/1f9ec.png guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1813281412
States that in an heterozygous gene, one allele will hide the presence of the other allele, rather than both alleles contributing to a phenotype, only one allele will be expressed, which is called dominant, instead the hidden allele is called  recessive. ]]> 2021-10-13 08:29:27 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1813281412 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1813960259 2021-10-13 13:40:28 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1813960259 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1813989123 He decided to study the trasmission of hereditary traits in pea plants.]]> 2021-10-13 13:48:49 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1813989123 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814080008 2021-10-13 14:14:28 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814080008 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814156939 gene:"unit of hereditary information, specific section of
 a chromosome, located on a fixed position"
allele:"different forms of a gene"
genotype: "the compete set of genetic material of an organism"
phenotype:"the set of an observable traits of an organism"
homozygus:"an organism that have two identical allele for a specific gene"
heterozygous: "an organism that have two different allele for a specific gene"]]> 2021-10-13 14:35:27 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814156939 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814676499 Considering plant size, he took tall and short plants from purebred lines, he called them the Parental Generation (P).
Mendel crossed tall purebred plants with short purebred plants creating a new generation: the "first filial generation" (F1).
Observing the F1 phenotype he discovered they were all tall plants.]]> 2021-10-13 17:21:13 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814676499 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814887563 2021-10-13 18:44:28 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814887563 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814921208 Mendel took the plants of the "first filial generation" (F1) and let them self-fertilize naturally, they generated the "second filial generation" (F2)
Again he observed the F2 plants phenotype and surprisingly, with a 1:3 ratio, the short trait reappeared.]]> 2021-10-13 18:59:08 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814921208 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814924827 2021-10-13 19:00:54 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1814924827 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821942876 The two alleles segregate during the development of gametes, and each parent’s offspring randomly obtains one factor.]]> 2021-10-17 10:59:46 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821942876 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821944675 2021-10-17 11:02:03 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821944675 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821951549 States that the alleles of two (or more) different genes get sorted into gametes independently of one another.
The validity of this law is related with the arranegment of the different genes on different chromosomes]]> 2021-10-17 11:10:58 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821951549 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821970245 He started considering more traits at the same time, for example colour and seed shape.
Crossing purebred plants producing yellow and round shaped  seeds with purebred plants producing green and wrinkled shaped seeds he obtained dihybrids (di- = two, -hybrid = heterozygous) round and yellow (dominant traits) plants.
He let them self-fertilize naturally and he found that  in the offspring there were four different categories of pea seeds, appearing in a ratio of approximately 9:3:3:1, and the combinations ratio can be predicted considering the two genes independent one from the other.]]> 2021-10-17 11:35:10 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821970245 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821972153 2021-10-17 11:37:52 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1821972153 guidoparonelli https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1822007672 In order to study how biologists calculate the possible genotypes of the offspring I suggest to watch this video:]]> 2021-10-17 12:11:54 UTC https://padlet.com/guidoparonelli/mmzjt5ggw5dtuxm6/wish/1822007672