Which of the following periods represents the duration of Mendel's hybridization experiments?

Mendel obtained pure-breeding pea lines by:

Mendel studied several traits in pea plants. Which of the following combinations represents the traits he studied?

Define the following terms: $Genes$ and $Alleles$.

Mendel's law of heredity can be explained with the help of

Statement-$1$: Alleles are slightly different forms of the same gene.
Statement-$2$: The segregation of alleles is a random process and so there is $50$ percent chance of a gamete containing either allele.