Question

Who rediscovered the result of Mendel’s experiments?
A. Hugo de Vries, Tschemark, Correns
B. Hugo de Vries, Tschemark, Morgan
C. Tschemark, Morgan, Correns
D. Tschemark, Bateson, Punnet

Answer 1

Hint: Gregor Johann Mendel was a scientist and was born in a German-speaking family. He is known as the founder of the modern science of genetics. Mendel conducted the experiments on pea plants in order to establish various rules on heredity which is now known as laws of Mendelian inheritance.

Complete answer: Mendel selected the pea plant for his experiment and considered the seven characteristics of pea plants. The seven characteristics are flower position and color, pod shape and color, plant height, and seed shape and colour. Mendel conducted the monohybrid cross and the dihybrid cross to know the phenotype and genotype of the progeny. To explain this, he coined the terms “dominant” and “recessive”. The phenotype of progeny F1 produced in monohybrid cross is always in the ratio of 3:1. The phenotype of progeny F1 produced in the dihybrid cross is always in the ratio of 9:3:3:1. The phenotype refers to the external appearance of an organism depending upon the genotype. Gregor Mendel proposed three laws of inheritance after successfully conducting the experiments. The law of dominance states that an organism with at least one dominant allele will have the phenotype appearance of the dominant allele. The law of segregation states that the alleles for each gene segregate from each other during gamete formation. So, that each gamete carries only one allele for each gene Law of independent assortment states that during the formation of gametes genes of different traits can segregate independently. The three botanists - Erich von Tschemark, Carl Correns, and Hugo de Vries, independently rediscovered Mendel’s work in 1900.
So, option A is the correct option.

Note: Hugo de Vries, Carl Correns and Erich von Tschemark were working on different hybrids of plants and review of their literature before publishing the results. This led them to Mendel's old papers. They named the work of Mendel as Mendel’s laws of inheritance and published it in “Flora” in the year 1901.