Define the term: Phenotype.

If two alleles for a particular trait in an organism are identical,it is called . . . . . .

$A$ heritable feature and its detectable variant is known as........

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:

$A$ gene that expresses itself in a heterozygous condition and shows its characteristic is called a...

When a true breeding pea plant that has yellow seeds is pollinated by a plant that has green seeds,all the $F_1$ plants have yellow seeds. This means that the allele for yellow is