By repeated self pollination
he put them in a jar and made them grow
Because they were all homozygous.
Mendel used all tall plants in his F1 experiment because that was the offspring from his cross of a pure tall plant and a pure short plant. By crossing two of the tall plants from F1, he proved that the recessive gene (t) was still present in the F1 generation, despite the phenotypes of all of these plants being tall. (The result of the F1 cross gave 3 tall plants and 1 short plant.)
Mendel is famous for his work with pea plants. These experiments led to the Law of Segregation and the Law of Independent Assortment. Several different pea-plant traits were used in his experiments, including seed type and flower colour.
Occasionally the Moonflower produces it. Not sure if there are any others.
They were homozygous.
He needed a pure generation of plants to ensure that there were no recessive factors when he conducted his experiments on heredity.
False.
Because they were all homozygous.
Mendel used all tall plants in his F1 experiment because that was the offspring from his cross of a pure tall plant and a pure short plant. By crossing two of the tall plants from F1, he proved that the recessive gene (t) was still present in the F1 generation, despite the phenotypes of all of these plants being tall. (The result of the F1 cross gave 3 tall plants and 1 short plant.)
Mendel is famous for his work with pea plants. These experiments led to the Law of Segregation and the Law of Independent Assortment. Several different pea-plant traits were used in his experiments, including seed type and flower colour.
Mendel first described what is called genetics. He used sweet peas and crossed pure bred plants. For example, he crossed short pure bred (recessive) with tall pure bred plants (dominant). If tall is dominant, all plants would be tall. Crossing these hybrid plants would give a ratio of 3 tall to 1 short. This is the basis from which all studies of genes come from.
Occasionally the Moonflower produces it. Not sure if there are any others.
he crossed two pure lines
They were homozygous.
As found on the Wikipedia page on Gregor Mendel: "This study [Mendel's pea plant experiments where he crossbred two pea plants, one purple and one white and from there it demonstrated dominant and recessive alleles] showed that one in four pea plants had purebred recessive alleles [usually white], two out of four were hybrid and one out of four were purebred dominant. His experiments led him to make two generalizations, the Law of Segregation and the Law of Independent Assortment, which later became known as Mendel's Laws of Inheritance." Breeding two of the pure, purple plants would yield only pure purple plants, however the hybrid ones (which would look like the pure ones) would yield three purple looking ones (one was pure, the others had recessive alleles) and the last one would be white (all recessive alleles) thus Mendel was eventually able to see that recessive alleles didn't just crop up randomly, they were traits that were suppressed and passed on invisibly to the next generation of plants. (sorry for the length >.< I hope this was helpful)
he crossed two pure lines
He needed a control group.