Mendel proposed which of the following terms for hereditary units?

Match the following (Column-$I$ with Column-$II$):

Column-$I$	Column-$II$
$a$. Allele	$i$. Two alleles of a gene are identical
$b$. Genotype	$ii$. An individual having two different alleles of a gene
$c$. Homozygous	$iii$. Genetic constitution of an organism
$d$. Heterozygous	$iv$. Alternative forms of a gene

Given below are two statements:
Statement $I$:
Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance.
Statement $II$:
Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour,flower colour,pod shape and colour,flower position and stem height.
In the light of the above statements,choose the correct answer from the options given below:

Which one of the following was the rediscoverer of Mendel's work?

When a plant has two identical alleles for a single trait,it is called.....

If the genotype of an individual consists of only one type of alleles at the same locus,it is called: